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 ('b37dfe4ea2c5b7edaf87a74b336ad64f', -1, 1503385756, 1503385756, '369c5c8a', -2, 0, 0)

Line : 187
File : sessions.php