MySQL ERROR:
Error Number: 3685
Description: Illegal argument to a regular expression.
Query: SELECT p.page_name, n.namespace_label
FROM exp_wiki_page AS p
LEFT JOIN exp_wiki_namespaces AS n ON n.namespace_name = p.page_namespace
LEFT JOIN exp_wiki_revisions AS r ON r.revision_id = p.last_revision_id
WHERE r.page_content REGEXP '\\[\\[proba[[:>:]].*\\]\\]'
AND p.wiki_id = '1'