bad join on event search

docs/changelog/7.x.x.txt

@@ -23,6 +23,7 @@
  - fix: Unable to view running workflows if spectre not running
  - protect Wiki pages from malformed html content
  - work around broken linking function in tinyMCE on Safari
+ - fix: Searching in Calendars finds multiple of same event
 
 7.4.8
  - fix: Syndicated Content doesn't display all items with multiple feeds in interleaved mode

lib/WebGUI/Asset/Wobject/Calendar.pm

@@ -1667,7 +1667,7 @@ sub www_search {
             keywords        => $keywords,
             classes         => ['WebGUI::Asset::Event'],
             lineage         => [$self->get("lineage")],
-            join            => "join Event on assetIndex.assetId=Event.assetId",
+            join            => "join Event on assetIndex.assetId=Event.assetId and assetIndex.revisionDate=Event.revisionDate",
             columns         => ['Event.startDate','Event.startTime'],
         );