Error I cant seem to remove for read only column

[Tragertt]

I am getting this error all of a sudden and I have tried removing columns and changing types and it wont go away, usually when APPSheet has to make a change on something because of a rule when you refresh it goes away, this one has been with me for 100+ refresh and I can seem to find where the error is

Any ideas where to fix this? Thank you!

[Aurelien]

Hi @Tragertt 

The message seems pretty clear. You have a column that you tagged as being the key-column, that uses the row number.

This is not a good practice. You may prefer using a dedicated key-column instead.

For more information, I suggest you have a look here:

UNIQUEID() 

Columns: The Essentials 

What is a key?