previous page link on search results a broken link

[tonycoz]

Context

[[provide more detailed introduction to the issue itself and why it is relevant]

I attempted a search and clicked the previous page link, for example from the follow search result page:

https://grep.metacpan.org/search?p=11&q=sv_setsv_cow

The previous page link, marked here:

links to

https://grep.metacpan.org/-10?p=10&q=sv_setsv_cow

Process

[ordered list the process to finding and recreating the issue, example below]

1. Perform a search with many pages of results
2. Click on the page 11 link
3. Click on the previous page link (as highlighted above)
4. 404 error

Expected result

Link navigates to the previous page of page links.

Current result

404 not found error.

Possible Fix

[not obligatory, but suggest fixes or reasons for the bug]

[if relevant, include a screenshot - simply drag & drop a picture there]