Bug description and reproduction steps

so im having a issue with the fabric version on my server, on the server side its fine no errors but when i try to enter the server i recive this error
" [00:35:57] [Server thread/INFO]: com.mojang.authlib.GameProfile@5a517f[id=fc41cafb-92d3-4bb9-80b7-92c94b3466b7,name=GoldSonXY,properties={textures=[com.mojang.authlib.properties.Property@6d83af50]},legacy=false] (/127.0.0.1:56985) lost connection: Protocol version for channel usefulbackpacks:slot_mod does not match. Expected: 0, received: ᛤ0ᛤ0MissingVersion "

i dont want to remove the mod mostly because im transfering a world with it and i dont want to lose items, can you help me

Log files and Screenshots

Used minecraft version

1.20.x

Used forge or fabric version

Fabric 1.20.1

Used mod version

useful_backpacks-fabric-1.20.1-2.0.1.119

Hello, thanks for the report. Can you please attach the log of the client and the server when this is happening?
Seems like a version mismatch between client mods and server mods. Do you use fabric and useful backpacks and uteamcore on the server and client?