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 ('445c6245a00a2e22c3c0a695af8d63fd', -1, 1511143980, 1511143980, '36e13959', 12, 0, 0)

Line : 187
File : sessions.php