Untested change to use TIMESTAMP instead of DATETIME for Monitor_Status/UpdatedOn. This is for mysql 5.5.

db/zm_create.sql.in

@@ -577,7 +577,7 @@ CREATE TABLE `Monitor_Status` (
   `CaptureFPS`  DECIMAL(10,2) NOT NULL default 0,
   `AnalysisFPS`  DECIMAL(5,2) NOT NULL default 0,
   `CaptureBandwidth`  INT NOT NULL default 0,
-  `UpdatedOn`     datetime NOT NULL default NOW(),
+  `UpdatedOn`     TIMESTAMP NOT NULL default CURRENT_TIMESTAMP,
   PRIMARY KEY (`MonitorId`)
 ) ENGINE=@ZM_MYSQL_ENGINE@;
 

db/zm_update-1.37.25.sql

@@ -3,8 +3,8 @@ SET @s = (SELECT IF(
      AND table_name = 'Monitor_Status'
      AND column_name = 'UpdatedOn'
     ) > 0,
-"SELECT 'Column UpdatedOn already exists in Monitor_Status'",
-"ALTER TABLE `Monitor_Status` ADD `UpdatedOn`     datetime NOT NULL default NOW() AFTER CaptureBandwidth"
+"ALTER TABLE `Monitor_Status` MODIFY `UpdatedOn` TIMESTAMP NOT NULL default CURRENT_TIMESTAMP",
+"ALTER TABLE `Monitor_Status` ADD `UpdatedOn`    TIMESTAMP NOT NULL default CURRENT_TIMESTAMP AFTER CaptureBandwidth"
 ));
 
 PREPARE stmt FROM @s;