I would like to delete "old" WeBWorK sections, i.e., sections that are at least one year old. I have been using the "Course Administration" interface to perform this task. However, recently, each time that I've deleted a section, the program responds with a message that the deletion of the section was successful, but then there is a long list of WeBWorK warnings. Moreover, when I refresh the page, I get the following error message:
An error occured while deleting the course MTH2003_JM13C_S07:
sql_single: failed to execute SQL statement 'DROP TABLE `MTH2003_JM13C_S07_problem_user`;': Unknown table 'MTH2003_JM13C_S07_problem_user'
I don't wish to damage the database. I'd appreciate any assistance in the explanation of the error message. I do have a copy of the long list of warnings if it would be of help.