An administrator configured WORM on an existing Objects bucket at 4 p.

According to the Nutanix Unified Storage (NCP-US) v6 documentation, once WORM (Write-Once-Read-Many) has been enabled on an Objects bucket, versioning cannot be immediately enabled. Instead, the WORM configuration must be disabled and then re-enabled, this time with Enable Version and Enable WORM checked. Since the administrator did not select Enable Version during the initial configuration, this step is necessary in order to enable versioning.

https://portal.nutanix.com/page/documents/solutions/details?targetId=NVD-2151-Unified-Storage:data-immutability-and-versioning.html

You can disable WORM within 24 hours of enabling it on a bucket1. This will allow you to change the versioning settings on the bucket.