On systems that allow overlapping MRNs, the HL7 Listener may log the following error upon receiving a message:
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Merging MRN with Assigning Authorities, but Target Assigning Authority [<assigning authority code>] was not valid.
This error may be logged when the Merge Into AutoFill Keyword Sets And Documents message action finds an invalid assigning authority in the PID segment of the HL7 merge message.
Assigning authorities are limited to 50 characters. Ensure the assigning authority is specified correctly in the HL7 message.