Unable to attach volumes coming from the NetApp Trident CSI on OpenShift nodes

Issue

• Failing to attach volume (PV) created from NetApp Trident CSI on OpenShift nodes due to the following error.

2022-05-05T22:49:22.996562065Z I0505 22:49:22.996522       1 reconciler.go:295] attacherDetacher.AttachVolume started for volume "pvc-xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx" (UniqueName: "kubernetes.io/csi/csi.trident.netapp.io^pvc-xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx") from node "node1.example.com" 
2022-05-05T22:49:23.551492725Z E0505 22:49:23.551344       1 csi_attacher.go:698] kubernetes.io/csi: attachment for pvc-xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx failed: rpc error: code = Internal desc = unable to update node access rules on backend backend-tbc-ontap-san; error removing IQN iqn.xxxx-xx.com.example:xxxxxxxxxxxx from igroup trident-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx: error removing IQN iqn.xxxx-xx.com.example:xxxxxxxxxxxx from igroup trident-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx: API status: failed, Reason: LUN maps for this initiator group exist, Code: 9029
2022-05-05T22:49:23.551524487Z I0505 22:49:23.551514       1 event.go:291] "Event occurred" object="project1/pod1" kind="Pod" apiVersion="v1" type="Warning" reason="FailedAttachVolume" message="AttachVolume.Attach failed for volume \"pvc-xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx\" : rpc error: code = Internal desc = unable to update node access rules on backend backend-tbc-ontap-san; error removing IQN iqn.xxxx-xx.com.example:xxxxxxxxxxxx from igroup trident-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx: error removing IQN iqn.xxxx-xx.com.example:xxxxxxxxxxxx from igroup trident-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx: API status: failed, Reason: LUN maps for this initiator group exist, Code: 9029"