Server thread/WARN Serialization errors

[Fidulus]

Neoforge, 1.21.8

Hy,
i am not sure this is "really" an issue or not but i wanted to tell you about it.
When i am using the cooking table connected to other blocks of the mod with inventories, and/or place a cow in a jar on the fridge or one of the counters, the console shows constantly in a 10sec loop:

[17:09:30] [Server thread/WARN] [minecraft/BlockEntity]: [net.minecraft.world.level.block.entity.BlockEntity] Serialization errors: cookingforblockheads:cooking_table // net.blay09.mods.cookingforblockheads.block.entity.CookingTableBlockEntity@BlockPos{x=94, y=78, z=59}: Failed to encode value '0 minecraft:air' to field 'NoFilterBook': Value must be within range [1;99]: 0; Item must not be minecraft:air

Now, i could place the "nofilter Book" on the cooking table to stop the message from spamming, but then i have no clue what i can actually cook and what not.
I am not able to place the other "recipe book" or anything else onto the cooking table to make it stop.

Any workarounds? Or am i doing something wrong?