Calibre Not Opening

[Delstrago]

Am Currently using version 7.3.0.

I rebooted my computer and when going to re-launch Calibre am getting the below error. I have tried repair as well as a full uninstall & re-install but continue to get the same error. Closing out of the error Calibre does not open but is still running in the background

calibre, version 7.3.0
ERROR: Startup error: There was an error during calibre startup. Parts of calibre may not function. Click "Show details" to learn more.

Traceback (most recent call last):
File "calibre\db\fields.py", line 186, in get_categories
KeyError: 373

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\db\cache.py", line 1549, in get_categories
File "calibre\db\categories.py", line 232, in get_categories
File "calibre\db\fields.py", line 191, in get_categories
calibre.db.fields.InvalidLinkTable: series

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\db\fields.py", line 186, in get_categories
KeyError: 373

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\gui2\tag_browser\model.py", line 1282, in _get_category_nodes
File "calibre\db\cache.py", line 1557, in get_categories
File "calibre\db\cache.py", line 1549, in get_categories
File "calibre\db\categories.py", line 232, in get_categories
File "calibre\db\fields.py", line 191, in get_categories
calibre.db.fields.InvalidLinkTable: series

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\db\fields.py", line 186, in get_categories
KeyError: 373

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\db\cache.py", line 1549, in get_categories
File "calibre\db\categories.py", line 232, in get_categories
File "calibre\db\fields.py", line 191, in get_categories
calibre.db.fields.InvalidLinkTable: series

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\db\fields.py", line 186, in get_categories
KeyError: 373

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\gui2\main.py", line 312, in initialize_db_stage2
File "calibre\gui2\main.py", line 255, in start_gui
File "calibre\gui2\ui.py", line 366, in initialize
File "calibre\gui2\tag_browser\ui.py", line 122, in init_tag_browser_mixin
File "calibre\gui2\tag_browser\view.py", line 392, in set_database
File "calibre\gui2\tag_browser\model.py", line 437, in set_database
File "calibre\gui2\tag_browser\model.py", line 512, in _run_rebuild
File "calibre\gui2\tag_browser\model.py", line 517, in _rebuild_node_tree
File "calibre\gui2\tag_browser\model.py", line 1288, in _get_category_nodes
File "calibre\db\cache.py", line 1557, in get_categories
File "calibre\db\cache.py", line 1549, in get_categories
File "calibre\db\categories.py", line 232, in get_categories
File "calibre\db\fields.py", line 191, in get_categories
calibre.db.fields.InvalidLinkTable: series

[DNSB]

One quick and dirty fix would be to uninstall calibre and delete the calibre install folder.

[kovidgoyal]

Those errors indicate a corrupted metadata.db file in your calibre library folder. Delete it and calibre should start with an empty metadata.db. You can then restore your books by clicking the calibre icon on the toolbar and using library maintenance->restore database

[Delstrago]

Thanks kovidgoyal. I had just come back on here to post that seemed to be the issue. I deleted the metadata.db and was able to open Calibre