Redmine

Hello

The clear_disabled_fields method in the Redmine codebase raises a NoMethodError exception when called,
and the IssuePriority model is missing. This occurs due to an attempt to access the id attribute of IssuePriority without verifying its presence. The proposed fix ensures that the method gracefully handles the case where IssuePriority is missing by checking for its presence before accessing its attributes.
I propose this patch