check if table eventlog exists

qa-include/db/install.php

@@ -1470,8 +1470,11 @@
 
 				case 63:
 					// convert IP addresses to new binary format
-					qa_db_upgrade_query('ALTER TABLE ^eventlog MODIFY ipaddress VARBINARY(16) NULL DEFAULT NULL');
-					qa_db_upgrade_query('UPDATE ^eventlog SET ipaddress = UNHEX(HEX(CAST(ipaddress AS UNSIGNED)))');
+					$eventlog_exists = (bool)qa_db_read_one_value(qa_db_query_sub("SELECT 1 FROM ^eventlog LIMIT 1"));
+					if($eventlog_exists){
+						qa_db_upgrade_query('ALTER TABLE ^eventlog MODIFY ipaddress VARBINARY(16) NULL DEFAULT NULL');
+						qa_db_upgrade_query('UPDATE ^eventlog SET ipaddress = UNHEX(HEX(CAST(ipaddress AS UNSIGNED)))');
+					}
 					
 					qa_db_upgrade_query('ALTER TABLE ^cookies MODIFY writeip VARBINARY(16) NULL DEFAULT NULL, MODIFY createip VARBINARY(16) NULL DEFAULT NULL');
 					qa_db_upgrade_query('UPDATE ^cookies SET writeip = UNHEX(HEX(CAST(writeip AS UNSIGNED))), createip = UNHEX(HEX(CAST(createip AS UNSIGNED)))');