How to recover from "Error : Alternate GPT is invalid, using primary GPT."

Issue

• Error: kernel: Alternate GPT is invalid, using primary GPT.

kernel: Alternate GPT is invalid, using primary GPT.
kernel: sdz: sdz1

• fdisk and parted command reports "Error : The backup GPT table is corrupt, but the primary appears OK, so that will be used."

fdisk -l /dev/sdz
The backup GPT table is corrupt, but the primary appears OK, so that will be used.  
Disk /dev/sdz: 9.1 TiB, 10000831348736 bytes, 2441609216 sectors
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 3FCCXXXX-YYYY-48D2-ZZZZ-ABABABABABA

Device     Start        End    Sectors  Size Type
/dev/sdz1      6 2441609209 2441609204  9.1T IBM General Parallel Fs


$ parted -s /dev/sdz
Error: The backup GPT table is corrupt, but the primary appears OK, so that will be used.
Model: WDC AAABBBCCCDDD (scsi)
Disk /dev/sdz: 2441609216s
Sector size (logical/physical): 4096B/4096B
Partition Table: gpt
Disk Flags: 

Number  Start  End          Size         File system  Name           Flags
 1      6s     2441609209s  2441609204s               GPFS:xxxyyyzzz  hidden