PHP Errors overwhelm log file

Just noticed a quickly growing php error log in my server folder. Going back 2 months, it was almost 4 gigs and 90+% of it are errors from this plugin (although it seems to be “working” just fine). I have it setup to just a couple of quotes in one categtory for now. Here are the oft-repeating lines that seem to come regardless of site activity. Any ideas on what to do?

[23-Dec-2024 17:01:29 UTC] PHP Warning:  Constant XV_RANDOMQUOTES_TABLE already defined in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/lib/class.constants.php on line 14
[23-Dec-2024 17:01:29 UTC] PHP Warning:  Constant XV_RANDOMQUOTES_TABLE already defined in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/lib/class.constants.php on line 14
[23-Dec-2024 17:01:29 UTC] PHP Warning:  Constant XV_RANDOMQUOTES_TABLE already defined in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/lib/class.constants.php on line 14
[23-Dec-2024 17:01:30 UTC] PHP Warning:  Undefined variable $linkto in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/inc/stray_functions.php on line 560
[23-Dec-2024 17:01:30 UTC] PHP Warning:  Undefined variable $sourcelinkto in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/inc/stray_functions.php on line 577
[23-Dec-2024 17:01:30 UTC] PHP Warning:  Undefined variable $beforeAll in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/inc/stray_functions.php on line 617
[23-Dec-2024 17:01:30 UTC] PHP Warning:  Undefined variable $beforeQuote in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/inc/stray_functions.php on line 618
[23-Dec-2024 17:01:30 UTC] PHP Warning:  Undefined variable $afterQuote in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/inc/stray_functions.php on line 618
[23-Dec-2024 17:01:30 UTC] PHP Warning:  Undefined variable $afterAuthor in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/inc/stray_functions.php on line 621
[23-Dec-2024 17:01:30 UTC] PHP Warning:  Undefined variable $afterSource in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/inc/stray_functions.php on line 624
[23-Dec-2024 17:01:30 UTC] PHP Warning:  Undefined variable $afterAll in /home/firstuucolumb/public_html/wp-content/plugins/xv-random-quotes/inc/stray_functions.php on line 632