Ok I use /plot clear [-423;403:ItsmeComplex_YT] ok dont clear my plot and say invalid plot id I use again
/plot clear [-423;403:SnakedBD_GG] and again say invalid plot id plz HELP

 

Sorry I CANT XD

 

It should be /plot clear then /plot confirm
No?

 

take me a example

 

The video above should help you.
All you have to do is stand on the plot and type /p clear /p confirm

Archiving.