When staff undid a scheduled cancellation on a membership that bills through
the payment provider, or cancelled a scheduled move to Flexible, the request
was refused with a provider error and nothing changed. The same happened when
a venue undid the cancellation of its own BookingBible subscription.

The request asked the provider to clear the cancellation in two ways at once,
which the provider rejects. It now asks in one way, which clears both a
cancellation scheduled for a date and one scheduled for the end of the period.

Nothing was changed by the failed attempts: the membership kept its scheduled
end, and the undo can simply be repeated now. Cancelling a scheduled move to
Flexible restores the current plan's renewal and removes the pending Flexible
membership, with nothing charged. A venue whose own subscription undo was
refused should retry it as the same team member who first tried; if that is
not possible, contact support to release the earlier attempt.

Cancelling a membership again on the same day after undoing a cancellation now
reaches the payment provider every time, instead of being answered from the
provider's cache of the earlier request.