Armourer's Workshop

Fix item duplicate when apply mulitp item stack in the skinning table (1.16-1.20)

Fix mannequin tool crash when copy a null texture mannequin (1.16-1.20)

thx @GabrielB124 report.

NOTE: This is an important fix, which could infinite items for players. it exists in all 2.0.0 versions, so we strongly recommend you to upgrade.