phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('81ff77a6f2359b83b0a645d5dd82bf9f', -1, 1519218545, 1519218545, '36eae930', 1, 0, 0)

Line : 187
File : sessions.php