### Steps to reproduce

1. Have 3 phases (A,B,C) enabled in a project, all with dates selected.

2. Clear the dates on Phase B.

3. Disable Phase B.

4. Observe Phase C dates, they do not follow Phase A's dates.


### What is the buggy behavior?

* Begin of the deletion Phase C is not rescheduled to follow Phase A.

* End of the deletion Editing Phase C Begin of the insertionhaveEnd of the insertion Begin of the deletion will show an inconsistent date selection, whereEnd of the deletion the Begin of the deletion user can select dates before theEnd of the deletion start date Begin of the insertiondisabled and not following the phase A.End of the insertion Begin of the deletion of Phase C.End of the deletion


### What is the expected behavior?

_Describe how the application should behave like. Example:_

1. Begin of the insertionEnable editing onEnd of the insertion Begin of the deletion DuringEnd of the deletion the Begin of the insertionstart date onEnd of the insertion phase Begin of the insertionC.End of the insertion Begin of the deletion deactivation, reschedule the following phases regardless if the deactivated phase has dates set.End of the deletion


### Screenshots and other files

**Deactivation of a phase without dates set (Not OK):**

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/624194/content">

**Deactivation of a phase with dates set (OK):**

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/624195/content">