How to safely remove rest of GTP?

[Slawa Olhovchenkov]

How to safely remove rest of GPT?
Disk have actual data (part of ZFS), I am don't need to destroy this
data.

GEOM: da6: the primary GPT table is corrupt or invalid.
GEOM: da6: using the secondary instead -- recovery strongly advised.
GEOM: da22: the primary GPT table is corrupt or invalid.
GEOM: da22: using the secondary instead -- recovery strongly advised.
GEOM: da6: the primary GPT table is corrupt or invalid.
GEOM: da6: using the secondary instead -- recovery strongly advised.
GEOM: da22: the primary GPT table is corrupt or invalid.
GEOM: da22: using the secondary instead -- recovery strongly advised.