Sub-ticket of MARS-40 SA.jtpUserId live split-brain — coordinated 4-step fix (reconcile 40 rows → create/import writes+3 reads switch to assignedTeacherUserId → vStudentAssignments jtpName join+back-compat alias → drop legacy col+move partial index). Folds in vPracticasSinEvaluar + vComisionAyudantesByJtp snapshot-view leaks. Root of MARS-21/28/Montoya bug family. · mars