WW 2.4 seems to work now. I dropped the entire webwork database on the new install and created the database anew. Then created admin course. Imported old courses' tables, wwdb_check, wwdb_upgrade.
In my previous attempt I imported the entire webwork DB from WW 2.2, deleted old admin_*, created new admin and ran wwdb_check and wwdb_upgrade. This did not work for some reason.
WeBWorK Main Forum
DB error in WW 2.4 with courses moved from 2.2
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