Thanks for the information, But I also raised a INC with BMC, but no luck,
Same issue for me and I found the workaround.
By exportdefal utility, then modify the XML created and then execute defcal utility to import the new calendar.
I'm afraid that v7 is now long retired. Is it possible for your site to upgrade?
I have done workaround by using exportdefal and defcal utality, but further work we would need solution.Thanks for the information
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We have done upgrade from v7 to v9 for some servers on Nov and December 2019. but some other will take time to upgrade.
which are all v7 servers, those are getting this error.
Any luck on this issue? did you find any solution for this issue?.Please let us know.
The temporary solution is to use the exportdefcal utility to export the calendar into XML format. Once you have the XML output, edit it for 2020 (which will involve some manual labour, depending on how detailed you calendar is) and import it back in.
More details are in the other thread linked at the top of this one.
The real fix is to migrate from v7.