ONTAP 9.13

set -privilege advanced

snapmirror promote -destination-path <SVM:volume>

cluster_src::*> snapmirror promote -destination-path svm1:svm1_m2

Warning: Promote will delete the offline read-write volume
         cluster_src://svm1/svm1_root and replace it with
         cluster_src://svm1/svm1_m2. Because the volume is offline,
         it is not possible to determine whether this promote will
         affect other relationships associated with this source.
Do you want to continue? {y|n}: y

set -privilege admin

volume rename -vserver <SVM> -volume <volume> -newname <new_name>

cluster_src::> volume rename -vserver svm11 -volume svm1_m2 -newname svm1_root