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 ('2560990a2397cb5cb26f546d15c8d0d3', -1, 1425594520, 1425594520, '36a632d5', -1, 0, 0)

Line : 187
File : sessions.php