Spelling mistake? Trengganu or Terengganu [solved]

Hello,
at the currency
Malay peninsula - Trengganu - Keping (1709-1909)
is a spelling mistake.
I think right is:
Malay peninsula - Terengganu - Keping (1709-1909)
CAn anybody fix it?
regards
Peter

Trengganu was the accepted spelling at the time period mentioned and through the time of British control of Malaya. Terengganu came into usage in the period of Malaysia. For stamps, the change of name seems to have been in 1986.

https://www.stampworld.com/en/stamps/Trengganu/Postage%20stamps/1980-1989

Will

Thanks for the information. Then I think there is nothing to do