[Resolved] database error Commands out of sync

Hi, after updating wpml plugins my logs are full of :

WordPress database error Commands out of sync; you can't run this command now for query SELECT option_value FROM wp_options WHERE option_name = '_wpml_transient__wpml_st_file_scan_in_progress' LIMIT 1 made by shutdown_action_hook, do_action('shutdown'), WP_Hook->do_action, WP_Hook->apply_filters, WPML_ST_Translations_File_Scan_Hooks->import_translations_files, WPML_ST_Translations_File_Queue->is_locked, WPML_Transient->get, get_option

errors every few minutes.

Also in my slow queries i get 3-8 seconds to execute this query :

SELECT DISTINCT
s.id,
s.name,
s.context,
st.status,
s.gettext_context,
st.value AS tra,
st.mo_string AS mo_string,
s.value AS orig
FROM wp_icl_string_pages sp
INNER JOIN wp_icl_string_urls su
ON su.id = sp.url_id
INNER JOIN wp_icl_strings s
ON s.id = sp.string_id
LEFT JOIN wp_icl_string_translations st
ON s.id=st.string_id
AND st.language=su.language
AND s.language!=su.language
WHERE (su.language='el' and su.url='ajax-request')
or (su.language='el' and su.url IS NULL);

These two errors (i dont know if one produces the other, or are 2 independent errors) slow down my site (big difference than before update).

How can i solve these? I've tried clearing cache, etc, using the clear buttons in troubleshooting etc.

best regards,