Thanks for the file. I added Old Permic to the GlyphData.
<glyph unicode="10350" name="an-oldpermic" sortName="op00" category="Letter" script="oldpermic" production="u10350" description="OLD PERMIC LETTER AN" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10351" name="bur-oldpermic" sortName="op01" category="Letter" script="oldpermic" production="u10351" description="OLD PERMIC LETTER BUR" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10352" name="gai-oldpermic" sortName="op02" category="Letter" script="oldpermic" production="u10352" description="OLD PERMIC LETTER GAI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10353" name="doi-oldpermic" sortName="op03" category="Letter" script="oldpermic" production="u10353" description="OLD PERMIC LETTER DOI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10354" name="e-oldpermic" sortName="op04" category="Letter" script="oldpermic" production="u10354" description="OLD PERMIC LETTER E" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10355" name="zhoi-oldpermic" sortName="op05" category="Letter" script="oldpermic" production="u10355" description="OLD PERMIC LETTER ZHOI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10356" name="dzhoi-oldpermic" sortName="op06" category="Letter" script="oldpermic" production="u10356" description="OLD PERMIC LETTER DZHOI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10357" name="zata-oldpermic" sortName="op07" category="Letter" script="oldpermic" production="u10357" description="OLD PERMIC LETTER ZATA" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10358" name="dzita-oldpermic" sortName="op08" category="Letter" script="oldpermic" production="u10358" description="OLD PERMIC LETTER DZITA" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10359" name="i-oldpermic" sortName="op09" category="Letter" script="oldpermic" production="u10359" description="OLD PERMIC LETTER I" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1035A" name="koke-oldpermic" sortName="op10" category="Letter" script="oldpermic" production="u1035A" description="OLD PERMIC LETTER KOKE" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1035B" name="lei-oldpermic" sortName="op11" category="Letter" script="oldpermic" production="u1035B" description="OLD PERMIC LETTER LEI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1035C" name="menoe-oldpermic" sortName="op12" category="Letter" script="oldpermic" production="u1035C" description="OLD PERMIC LETTER MENOE" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1035D" name="nenoe-oldpermic" sortName="op13" category="Letter" script="oldpermic" production="u1035D" description="OLD PERMIC LETTER NENOE" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1035E" name="vooi-oldpermic" sortName="op14" category="Letter" script="oldpermic" production="u1035E" description="OLD PERMIC LETTER VOOI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1035F" name="peei-oldpermic" sortName="op15" category="Letter" script="oldpermic" production="u1035F" description="OLD PERMIC LETTER PEEI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10360" name="rei-oldpermic" sortName="op16" category="Letter" script="oldpermic" production="u10360" description="OLD PERMIC LETTER REI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10361" name="sii-oldpermic" sortName="op17" category="Letter" script="oldpermic" production="u10361" description="OLD PERMIC LETTER SII" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10362" name="tai-oldpermic" sortName="op18" category="Letter" script="oldpermic" production="u10362" description="OLD PERMIC LETTER TAI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10363" name="u-oldpermic" sortName="op19" category="Letter" script="oldpermic" production="u10363" description="OLD PERMIC LETTER U" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10364" name="chery-oldpermic" sortName="op20" category="Letter" script="oldpermic" production="u10364" description="OLD PERMIC LETTER CHERY" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10365" name="shooi-oldpermic" sortName="op21" category="Letter" script="oldpermic" production="u10365" description="OLD PERMIC LETTER SHOOI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10366" name="shchooi-oldpermic" sortName="op22" category="Letter" script="oldpermic" production="u10366" description="OLD PERMIC LETTER SHCHOOI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10367" name="yry-oldpermic" sortName="op23" category="Letter" script="oldpermic" production="u10367" description="OLD PERMIC LETTER YRY" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10368" name="yeru-oldpermic" sortName="op24" category="Letter" script="oldpermic" production="u10368" description="OLD PERMIC LETTER YERU" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10369" name="o-oldpermic" sortName="op25" category="Letter" script="oldpermic" production="u10369" description="OLD PERMIC LETTER O" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1036A" name="oo-oldpermic" sortName="op26" category="Letter" script="oldpermic" production="u1036A" description="OLD PERMIC LETTER OO" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1036B" name="ef-oldpermic" sortName="op27" category="Letter" script="oldpermic" production="u1036B" description="OLD PERMIC LETTER EF" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1036C" name="ha-oldpermic" sortName="op28" category="Letter" script="oldpermic" production="u1036C" description="OLD PERMIC LETTER HA" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1036D" name="tsiu-oldpermic" sortName="op29" category="Letter" script="oldpermic" production="u1036D" description="OLD PERMIC LETTER TSIU" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1036E" name="ver-oldpermic" sortName="op30" category="Letter" script="oldpermic" production="u1036E" description="OLD PERMIC LETTER VER" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="1036F" name="yer-oldpermic" sortName="op31" category="Letter" script="oldpermic" production="u1036F" description="OLD PERMIC LETTER YER" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10370" name="yeri-oldpermic" sortName="op32" category="Letter" script="oldpermic" production="u10370" description="OLD PERMIC LETTER YERI" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10371" name="yat-oldpermic" sortName="op33" category="Letter" script="oldpermic" production="u10371" description="OLD PERMIC LETTER YAT" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10372" name="ie-oldpermic" sortName="op34" category="Letter" script="oldpermic" production="u10372" description="OLD PERMIC LETTER IE" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10373" name="yu-oldpermic" sortName="op35" category="Letter" script="oldpermic" production="u10373" description="OLD PERMIC LETTER YU" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10374" name="ya-oldpermic" sortName="op36" category="Letter" script="oldpermic" production="u10374" description="OLD PERMIC LETTER YA" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10375" name="ia-oldpermic" sortName="op37" category="Letter" script="oldpermic" production="u10375" description="OLD PERMIC LETTER IA" anchors="top" marks="anComb-oldpermic, doiComb-oldpermic, zataComb-oldpermic, nenoeComb-oldpermic, siiComb-oldpermic" />
<glyph unicode="10376" name="anComb-oldpermic" sortName="op38" category="Mark" subCategory="Nonspacing" script="oldpermic" production="u10376" description="COMBINING OLD PERMIC LETTER AN" anchors="_top" />
<glyph unicode="10377" name="doiComb-oldpermic" sortName="op39" category="Mark" subCategory="Nonspacing" script="oldpermic" production="u10377" description="COMBINING OLD PERMIC LETTER DOI" anchors="_top" />
<glyph unicode="10378" name="zataComb-oldpermic" sortName="op40" category="Mark" subCategory="Nonspacing" script="oldpermic" production="u10378" description="COMBINING OLD PERMIC LETTER ZATA" anchors="_top" />
<glyph unicode="10379" name="nenoeComb-oldpermic" sortName="op41" category="Mark" subCategory="Nonspacing" script="oldpermic" production="u10379" description="COMBINING OLD PERMIC LETTER NENOE" anchors="_top" />
<glyph unicode="1037A" name="siiComb-oldpermic" sortName="op42" category="Mark" subCategory="Nonspacing" script="oldpermic" production="u1037A" description="COMBINING OLD PERMIC LETTER SII" anchors="_top" />
Please have a look if the names need adjustments?