Hello.

Suddenly editing from the frontend stopped working. Though it had been working before.

1064
YOU HAVE AN ERROR IN YOUR SQL SYNTAX; CHECK THE MANUAL THAT CORRESPONDS TO YOUR MYSQL SERVER VERSION FOR THE RIGHT SYNTAX TO USE NEAR 'AND TRASH = 0' AT LINE 1 SQL=SELECT MAX(ORDERING) FROM M8KYX_K2_ITEMS WHERE CATID = AND TRASH = 0

I have read similar messages on the forum and in most cases the error was caused by some other extensions. But I can't imaging what it could be in my case. I did not install anything in between it had been working and it stopped.

Sorry, it was solved.

Some categories which were chosen as available in K2 user group were changed. After I chose them again in K2 user group settings the error has gone.

Thank you for sharing the solution rufina.