### Steps to reproduce

1. Login as a user with permissions to create meetings

2. Go to the Meetings module

3. Click on '+Meeting' and select Recurring

4. Make sure the date is in the future, so that the meeting series starts in the future

5. Create recurring Meeting

6. On the next page, click on Finish template

7. On the meeting series page, click on the first meeting (we'll call it meeting A)

8. On the meeting A page, click on the cogwheel

9. On the meeting details modal, change the date to a past date

10. Go back to the meeting series page


### What is the buggy behavior?

* meeting A is still showing in the upcoming tab

* Date is stroke through (i guess to show it was edited, which is nice but maybe superfluous here?)

* meeting A is not showing in the past tab


### What is the expected behavior?

1. Begin of the insertionItEnd of the insertion Begin of the deletion meeting AEnd of the deletion is Begin of the insertionnot possible to schedule an upcoming occurrence to beforeEnd of the insertion Begin of the deletion showing up inEnd of the deletion the Begin of the insertioncurrent dateEnd of the insertion Begin of the deletion Past tabEnd of the deletion

2. Begin of the deletion meetingEnd of the deletion A Begin of the insertionvalidation errorEnd of the insertion is Begin of the insertionshownEnd of the insertion Begin of the deletion notEnd of the deletion in Begin of the insertionthat caseEnd of the insertion Begin of the deletion the Upcoming tab

3. as for the stroke through date, i'm not sure what should be the expectation hereEnd of the deletion


### Screenshots and other files

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/249548/content">

### <img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/249549/content">

### Environment information

**OpenProject version**

Core build

[9fe2a2fb620e5d021e3e2ee5805e12e0893bdfee](https://github.com/opf/openproject/commits/9fe2a2fb620e5d021e3e2ee5805e12e0893bdfee)

Product version

[0cae0b779e92a93869f91932ccf00d77905082bf](https://github.com/opf/saas-openproject/commits/0cae0b779e92a93869f91932ccf00d77905082bf)

Core version

OpenProject 15.2.0

**Browser**

* [ ] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Operating System**

* [x] Windows
* [ ] Mac OS X
* [ ] Mobile iOS
* [ ] Mobile Android
* [ ] Linux (please specify distro)
* [ ] Chrome OS
* [ ] Other (please specify)