upgraded my sogo install from the most current v4.0.1 nightly in the Debian repositories to the latest v4.0.2 nightly build from the Debian repositories.
2018-09-15 12:22:02.175 sogo-tool[1941] MySQL4 connection established 0x0x2934060
2018-09-15 12:22:02.177 sogo-tool[1941] MySQL4 channel 0x0x270a1b0 opened (connection=0x0x2934060,sogo)
2018-09-15 12:22:02.177 sogo-tool[1941] <MySQL4Channel[0x0x270a1b0] connection=0x0x2934060> SQL: SELECT count(*) FROM sogo_sessions_folder WHERE c_lastseen <= 1536990722;
2018-09-15 12:22:02.177 sogo-tool[1941] <MySQL4Channel[0x0x270a1b0] connection=0x0x2934060> query has results, entering fetch-mode.
2018-09-15 12:22:02.536 sogo-ealarms-notify[1943] MySQL4 connection established 0x0x109d090
2018-09-15 12:22:02.536 sogo-ealarms-notify[1943] MySQL4 channel 0x0x10ca2a0 opened (connection=0x0x109d090,sogo)
2018-09-15 12:22:02.537 sogo-ealarms-notify[1943] <MySQL4Channel[0x0x10ca2a0] connection=0x0x109d090> SQL: BEGIN;
2018-09-15 12:22:02.537 sogo-ealarms-notify[1943] <MySQL4Channel[0x0x10ca2a0] connection=0x0x109d090> query has no results.
2018-09-15 12:22:02.537 sogo-ealarms-notify[1943] <MySQL4Channel[0x0x10ca2a0] connection=0x0x109d090> SQL: SELECT t1.c_alarm_number, t1.c_name, t1.c_path, t1.c_recurrence_id, t1.c_uid FROM sogo_alarms_folder t1 WHERE t1.c_alarm_date >= 1536992220 AND t1.c_alarm_date <= 1536992520;
2018-09-15 12:22:02.538 sogo-ealarms-notify[1943] <MySQL4Channel[0x0x10ca2a0] connection=0x0x109d090> query has results, entering fetch-mode.
2018-09-15 12:22:02.538 sogo-ealarms-notify[1943] <MySQL4Channel[0x0x10ca2a0] connection=0x0x109d090> SQL: ROLLBACK;
2018-09-15 12:22:02.538 sogo-ealarms-notify[1943] <MySQL4Channel[0x0x10ca2a0] connection=0x0x109d090> query has no results.