Important considerations when performing chain analysis online
When using the CHANALYS qualifier, dbkeys in the chain are displayed in addition to the lengths of the chains. When this is used in an online database, the following inconsistencies might appear:
Duplicate dbkeys in the chain
Fewer blocks in the chain than reported in the chain length
The actual chain may contain more dbkeys than are reported
These inconsistencies do not automatically indicate a problem with the chain; it may be the result of reporting on a changing chain. For more information, see PROUTIL Utility.
Duplicate dbkeys in the chain