Any ideas what's causing "blk_update_request: operation not supported error" in lxc

[sansans]

I migrated off to a cluster version for test , and restore some lxc from backup.
Formatted old machine so can't run back on previous environment.

LXC storage is on NFS

I get errors like this snippet below

[ 2464.141794] blk_update_request: operation not supported error, dev loop0, sector 230740224 op 0x9WRITE_ZEROES) flags 0x800 phys_seg 0 prio class 0
[ 2464.357791] blk_update_request: operation not supported error, dev loop0, sector 230744320 op 0x9WRITE_ZEROES) flags 0x800 phys_seg 0 prio class 0
[ 2467.381764] print_req_error: 13 callbacks suppressed
[ 2467.381767] blk_update_request: operation not supported error, dev loop0, sector 234930432 op 0x9WRITE_ZEROES) flags 0x800 phys_seg 0 prio class 0
[ 2467.808379] blk_update_request: operation not supported error, dev loop0, sector 234934528 op 0x9WRITE_ZEROES) flags 0x800 phys_seg 0 prio class 0
[ 2468.021759] blk_update_request: operation not supported error, dev loop0, sector 234938624 op 0x9WRITE_ZEROES) flags 0x800 phys_seg 0 prio class 0