Change length of CHAR 8 > CHAR 14. Possible?

Hello,

I have CHAR 8 object A (with masterdata and text). This object is Navigation Attribute of Object B.

Object A is not in DSO or Cube. Just object B.

Now I have the requirement to Change length of object A from CHAR 8 to CHAR 14.

Is it necessary to delete all data Targets of InfoObject B in order to delete master data of A and do afterwards a master data deletion?

Or is there no Need to delete masterdata? Just Change the length of A from 8 to 14...and that's it?

Is there an Impact of historical data?

Something to Keep in mind?

Thanks in advance for Input.