There is more that would need to be done. See https://webwork.maa.org/wiki/Release_notes_for_WeBWorK_2.17 for details on upgrading. I don't know if these will work for an OVA image though.
Note that the 2.17 branch is the "main" branch.
WeBWorK Problems
Refreshing Page causes Error: Failed to validate Service Ticket
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