Update, I tried incrementally installing versions..
From 0.6.16 to 0.6.17 - Worked
From 0.6.17 to 0.6.18 - Worked
From 0.6.18 to 0.6.19 - Worked
From 0.6.19 to 0.6.20 - Error Same error.
From 0.6.19 to 0.6.21 - Error Same error.
ERROR: Invalid database: <p>An invalid library already exists at P:/Seagate 1TB/Calibre eBooks, delete it before trying to move the existing library.<br>Error: duplicate column name: uuid
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 142, in run
OperationalError: duplicate column name: uuid
Traceback (most recent call last):
File "site-packages\calibre\gui2\wizard\__init__.py", line 440, in move_library
File "site-packages\calibre\library\database2.py", line 427, in __init__
File "site-packages\calibre\library\database2.py", line 670, in upgrade_version_7
File "site-packages\calibre\library\sqlite.py", line 171, in run
DatabaseException: duplicate column name: uuid
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 142, in run
OperationalError: duplicate column name: uuid