During the investigation of why on Malawi production server parents are constantly disappearing from the supervisory node configuration, we found that they are removed by referencedata-seed-tool. This tool uses the endpoint to update/add requisition groups which means that it is a bug in the OpenLMIS core project.
The issue can be related to this ticket: https://openlmis.atlassian.net/browse/OLMIS-6470.
1. Try to update some requisition group related to some child supervisory node (without any changes).
2. The child supervisory node doesn't have a parent associated anymore.
During testing make sure that issue from doesn’t come back!