In your TConstruct compatibility recipes there is a recipe for Tinkers' Bronze (recipe ID createaddition:compat/tconstruct/tinkers_bronze) that didn't get deleted properly after TConstruct replaced it with Amethyst Bronze. There was #373 but the recipe remains.
This affects all active branches as of commits 2fc2bcf (main), 2104510 (1.21.1) and 4d26e72 (fabric-1.20.1)