Dimensions on new table 50022 (NAV 2016)

Hi

I would like to add Dimensions to my new Table 50022.
I added an action as on til ITEM-Card.
"Table ID=CONST(50022),No.=FIELD(No.)"

But gets this message :

Table ID must not be 50022 in Default Dimension Table
ID='50022',No.= 'HERNING',Dimension Code=".

Can someone help me out here - thanks

/Kenneth