Disk error PC image

I am attempting to install an x86 generic 19.07.3 image. It works and loads no problem, all works. When I open gdisk I get an error:-

Found valid MBR and corrupt GPT. Which do you want to use? (Using the
GPT MAY permit recovery of GPT data.)
1 - MBR
2 - GPT
3 - Create blank GPT

Like wise with cgdisk

Could not load partitions from '/dev/sda'! Aborting!

I know I am missing something.

Thanks in advance Eric