Chart corrections Imray

[checktimit]

Hi there
I'm trying to correct the old charts onboard.
The Admiralty charts are easy to correct.
Buth I have Imray charts, witch are not the latest version.
If I try to find the corrections, I only find the corrections from the latest edition.
Can someone tell me how to correct old editions?
(I'm sorry for my language, I'm still learning )
Thank you
Wouter Kiekens