Cause
In a polygon geometry there is more than one exterior ring.
In a polygon geometry there is more than one exterior ring.
Set the type to be multipolygon if more than one exterior ring is present in the geometry.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/9506913
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