I'm getting errrors when i,m trying to do a self reference in database manager

I have a column in a table that i want to refrence to the same table it is contained,i get errors every time i try it .is it bug ? or its not possible in wappler databaser manager?

ok…i got it solved, by creating another column…it seems changing existing column to a reference column ,is not working, unless you create a new column for the reference