Cause
An ADD PARTITION operation cannot be executed when a partition with DEFAULT values exists
An ADD PARTITION operation cannot be executed when a partition with DEFAULT values exists
Ensure that DEFAULT is not specified for ADD/DROP VALUES or SPLIT partition/subpartition operation.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/4223718
https://community.oracle.com/message/2282143
https://community.oracle.com/message/3480986
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