Resolution:
The exception is thrown when EMS detects that destinations with overlapping wildcards are assigned to different stores or multicast properties.

Refer to the "Wildcards" section in the EMS User's Guide. Below is an excerpt:

Overlapping Wildcards and Disjoint Properties
Some destination properties are disjoint, and the server allows that property to be set only once for each destination. If an existing destination includes a value for a disjoint property and you attempt to assign a different value, the action will fail.
Overlapping wildcard destinations can cause conflicts with disjoint properties. For example, consider the following configuration of the channel property:
topic.multicast.> channel=multicast_1
topic.multicast.quotes.* channel=multicast_2
The topic topic.multicast.quotes.tibx would be assigned both channels, multicast_1 and multicast_2. Therefore, the wildcard topics topic.multicast.> and topic.multicast.quotes.* cannot coexist. Their creation would fail.
The disjoint destination properties are:
•channel
•store
   

Exception, "bad destination specification: overlapping destinations cannot specify different stores".

EMS User's Guide.