Event editor person should not drop instance specific data, by updating date and time info.
Add a field to an instance like "media", create an instance with media, update dates on the series.
Maybe check dates to see if they are equivalent to currently existing instances.
Also maybe a normal entity relationship for "custom", which could also benefit from "inline_entit_forms".
Active
2.0
Recurring Events (Main module)
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Issue #3298679 by owenbush: By updating a series, it deletes all the...
Ignore the last commit, I was getting 8.x-1.x in sync with 2.0.x