Found the TB in, and picked it up from:
GCG6ET "Teufelssee-Cache"
today where it had been dropped by "wanderhapf" on Aug 11 who had retrieved it from "Ruppiner Sturzflug" (GCQKHZ) on Aug 10.
Will be in our hands for a couple of days now.
(N.B.: there's no obvious way to "repair" such a situation - we hope that the situation will become clear again when the TB is dropped at another cache location.)