I think MySQLCLUSTER has more size constraints than MySQL. You could try to yank the form_ros entry from openemr/sql/database.sql . This wouldn’t break OpenEMR, just won’t allow you to use the ‘review of systems’ form. Also, there’s another ‘review of system’ in the database and I’m guessing you may need to remove that also (I’d see if you get the error first though).