Hi,
please understand VVOL logical metadata (For example to answer the question: "Where are my VMs on the SAN??") is NOT stored on your san array - it is stored on the VP and the vCenter. Thus, it is also crucial to mention the importance to backup these two very regular. So - if you hard delete a VVOL storage container on your SAN system without letting vSphere know about that you might get metadata confused. Thus - i highly suggest to open a support case with VMware - let it checked out before doing trial-and-error.
Best,
Joerg