Created attachment 8724605 [details] thunderbird-informations-for-bug-fixing.txt User Agent: Mozilla/5.0 (Windows NT 5.1; rv:44.0) Gecko/20100101 Firefox/44.0 Build ID: 20160210153822 Steps to reproduce: I have several calendars on google with recurring event series in them. I installed lightning and provider for google calendar version 2.7. I connected and synchronized them successfully. I tried to modify a single event of one of the series. Actual results: A small message window appeared : "This entry has recently been modified on the server, transmitting the changes will overwrite the changes made on the server. transmit anyway or discard?" I had not changed anything on this event series or calendar on Google recently. I choose "transmit anyway". Nothing happened. In the error log appeared entries like the following: Zeitstempel: 29.02.2016 00:54:30 Fehler: [calGoogleCalendar] Modifying item W failed:2152334338: [object Object] Quelldatei: file:///C:/Dokumente%20und%20Einstellungen/Customer/Anwendungsdaten/Thunderbird/Profiles/zjvpw31f.default/extensions/%7Ba62ef8ec-5fdc-40c2-873c-223b8a6925cc%7D/components/calGoogleCalendar.js Zeile: 528 Expected results: No message about recent modification on the Google server should have appeared. The synchronization should work. Interestingly, the error happens only in one of my google calendars. In the other calendars, I can modify any event without even beeing asked, whether I want to change a single event or the whole series. I was not able to point out the difference between the google calendars, why some can be modified and others not.
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