stdClass Object Error Log

Hello,

I am extremely brand new to Opencart (only been using it two days) and I am migrating a site. I have noticed in the Error Logs page there is a recurring error as per the code below:

stdClass Object
(
[num_rows] => 1
[row] => Array
(
[url_alias_id] => 56666
[query] => manufacturer_id=43
[keyword] => walraven-products
[lang] => 0
)

[rows] => Array
(
[0] => Array
(
[url_alias_id] => 56666
[query] => manufacturer_id=43
[keyword] => walraven-products
[lang] => 0
)

)
)

This has spiralled on with the last developer not fixing the issue and resulted in an error.log file size of 1.87GB.

Can anyone please tell me how to resolve this issue?

Kind regards
Julian