Does not work:
mods.astralsorcery.Altar.removeAltarRecipe("astralsorcery:shaped/internal/altar/constellationpaper/aevitas");
and replacing with a modified recipe
The entire recipe:
mods.astralsorcery.Altar.removeAltarRecipe("astralsorcery:shaped/internal/altar/constellationpaper/aevitas");
mods.astralsorcery.Altar.addConstellationAltarRecipe("astralsorcery:shaped/internal/altar/constellationpaper/aevitas", astralsorcery:itemconstellationpaper.withTag({astralsorcery: {constellationName: "astralsorcery.constellation.aevitas"}}), 2000, 400, [
terra, salisMundis, terra,
aquamarineGem, parchment, aquamarineGem,
terra, scribingTools, terra,
illuminationPowder,illuminationPowder,illuminationPowder,illuminationPowder,
ore:dustAstralStarmetal,ore:dustAstralStarmetal,ore:dustAstralStarmetal,ore:dustAstralStarmetal, null, null, null, null]);

What is the error in the logs on startup? What if you check the ct syntax via command?

Why did you open a bug ticket instead of coming to the discord for help on implementation?

You mean the channel in Discord. I only found out about it today.
My problem is that the new constellation aevitas recipe is not accepted in Astral Tome, the command is correct.