phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a0b26dc25418f425b1836943c46a12f2' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a0b26dc25418f425b1836943c46a12f2', -1, 1537650162, 1537650162, '7f000001', -1, 0, 0)

Line : 194
File : sessions.php