In Friends Asking Friends, donations can be moved between Thon events provided that the status of both events is the same. For example, a donation made to an active event can only be moved to another active event. At times, the list of available events with the same status will not display correctly and may be missing events. As a result, the donation cannot be moved.
Chat with Support and reference this article. Alternative Solution: Delete the donation from the initiative and re-enter it (or ask the supporter to re-enter it)in the correct initiative.