Great mod -Just having issues with clicking confirm on a buy or sell because it crashes after that

[Weeber2000]

After I click on confirm it crashes, I can click on the sign and set it up with no problems and seems to work fine until I hit confirm. then the server crashes. with the following errors:

Gunpowder Database Thread/ERROR Error on Database Thread! Please report to the mod author if this is unexpected!

it says "Abort due to constraint violation (UNIQUE constraint failed: Balance.user)"

line 1785 is where run the file here are my logs:
https://paste.shockbyte.com/kavidenefesazazugiqa

[Martmists-GH]

Does this also happen on the 1.17 version?

[Weeber2000]

no just the 1.16.5 version, the 1.17 works but my smp is still on 1.16

[Weeber2000]

im just testing out the older versions of the signshop
edit: they don't work as well as the new one on my server at least