Hi,
Breaking Volume SnapMirror relationship of a SnapLock Compliance(SLC) volume causes the data in the destination volume to be locked for the duration of the retention period. Hence reinitialization or resynchronization to the destination volume is not allowed until the end of the retention period.
Refer https://mysupport.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=229202
