Fatal Error message when trying to add text widget to sidebar

Hi, adding a text widget to a sidebar with several preexisting text widgets already in the sidebar causes this error message tp appear:

Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 60141 bytes) in /data/9/3/15/142/3015142/user/3347818/htdocs/marsartists/wp-includes/wp-db.php on line 1094

Attempting to edit one of the preexisting text widgets in the sidebar also evokes this error message…any help would be appreciated, thanks!