-692 THE REQUIRED UNIQUE INDEX index-name FOR DDL REGISTRATION TABLE table-name DOES NOT EXIST
Explanation
A unique index must be defined for each registration table. The code is issued when either the required index does not exist or the index defined is not a unique index.
System action
The statement cannot be processed.
Programmer response
Determine whether the required unique index does exist. If not, create the required index. If the index does exist, but is not unique, drop it and re-create it as a unique index.
SQLSTATE
57018