Random null value in column "exitstatus"

[apo5698]

2021-02-15T18:19:49.545546+00:00 app[web.1]: I, [2021-02-15T18:19:49.545479 #88]  INFO -- : [d3e81ef0-bb88-4ecd-bcb5-463d673a75df] Completed 500 Internal Server Error in 5190ms (ActiveRecord: 28.5ms | Allocations: 6058)
2021-02-15T18:19:49.547353+00:00 app[web.1]: F, [2021-02-15T18:19:49.547286 #88] FATAL -- : [d3e81ef0-bb88-4ecd-bcb5-463d673a75df]   
2021-02-15T18:19:49.547354+00:00 app[web.1]: [d3e81ef0-bb88-4ecd-bcb5-463d673a75df] ActiveRecord::NotNullViolation (PG::NotNullViolation: ERROR:  null value in column "exitstatus" violates not-null constraint
2021-02-15T18:19:49.547366+00:00 app[web.1]: DETAIL:  Failing row contains (5977, 99, 21, Error, , , null, 0.00, Program runs: Program does not run, 2021-02-15 05:09:05.287818, 2021-02-15 18:19:49.521765, {"Program exits with code ","Output does not match regular expre...).
2021-02-15T18:19:49.547367+00:00 app[web.1]: ):
2021-02-15T18:19:49.547368+00:00 app[web.1]: [d3e81ef0-bb88-4ecd-bcb5-463d673a75df]   
2021-02-15T18:19:49.547368+00:00 app[web.1]: [d3e81ef0-bb88-4ecd-bcb5-463d673a75df] app/models/grade_item.rb:123:in `run'
2021-02-15T18:19:49.547369+00:00 app[web.1]: [d3e81ef0-bb88-4ecd-bcb5-463d673a75df] app/controllers/api/grade_items_controller.rb:23:in `update'