https://userapps.support.sap.com/sap/support/knowledge/en/3519804
3519804 - WM Storage Units and/or Quants Deleted when Stock is Transferred or Consumed. | SAP...
Warehouse Management(WM) Storage Units(SU) and/or Quants deleted when stock has been transferred or consumed. An SU was selected as a source SU in a Transfer...