some errors in my error log

hello.

I have these errors in my error log and i can’t understand the meaning of these ? is there a way i can fix them ? should i have to worry about them ?

Thank you!!!

[Mon May 23 10:37:06.854381 2016] [fcgid:warn] [pid 7218] [client 93.174.126.19:46940] mod_fcgid: stderr: \xce\xa3\xcf\x86\xce\xac\xce\xbb\xce\xbc\xce\xb1 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ‘AND post_type LIKE ‘attachment’ AND post_mime_type LIKE ‘image/%” at line 1 \xce\xb2\xce\xac\xcf\x83\xce\xb7\xcf\x82 \xce\xb4\xce\xb5\xce\xb4\xce\xbf\xce\xbc\xce\xad\xce\xbd\xcf\x89\xce\xbd WordPress \xce\xb3\xce\xb9\xce\xb1 \xce\xb1\xce\xaf\xcf\x84\xce\xb7\xcf\x83\xce\xb7 SELECT guid FROM wp_posts\tWHERE id = AND post_type LIKE ‘attachment’ AND post_mime_type LIKE ‘image/%’ ; \xce\xb1\xcf\x80\xcf\x8c do_action_ref_array, call_user_func_array, skroutz_xml_do_this_hourly, require_once(‘/plugins/woo-xml-feed-skroutz-bestprice/createsk.php’)
[Mon May 23 10:37:06.854494 2016] [fcgid:warn] [pid 7218] [client 93.174.126.19:46940] mod_fcgid: stderr: \xce\xa3\xcf\x86\xce\xac\xce\xbb\xce\xbc\xce\xb1 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ‘AND post_type LIKE ‘attachment’ AND post_mime_type LIKE ‘image/%” at line 1 \xce\xb2\xce\xac\xcf\x83\xce\xb7\xcf\x82 \xce\xb4\xce\xb5\xce\xb4\xce\xbf\xce\xbc\xce\xad\xce\xbd\xcf\x89\xce\xbd WordPress \xce\xb3\xce\xb9\xce\xb1 \xce\xb1\xce\xaf\xcf\x84\xce\xb7\xcf\x83\xce\xb7 SELECT guid FROM wp_posts\tWHERE id = AND post_type LIKE ‘attachment’ AND post_mime_type LIKE ‘image/%’; \xce\xb1\xcf\x80\xcf\x8c do_action_ref_array, call_user_func_array, skroutz_xml_do_this_hourly, require_once(‘/plugins/woo-xml-feed-skroutz-bestprice/createbp.php’)

https://www.ads-software.com/plugins/woo-xml-feed-skroutz-bestprice/