### Steps to reproduce

1. Login as a project admin

2. Go to a project overview with existing budget and logged unit costs


### What is the buggy behaviour?

* The actual costs per month widget does not show previous 11month


### What is the expected behaviour?

1. As per the Begin of the insertionAC, edited after Alex's inputEnd of the insertion Begin of the deletion ACEnd of the deletion


> Begin of the insertionWidget shows 12 full calendar months, ending with theEnd of the insertion Begin of the deletion TheEnd of the deletion current month Begin of the deletion as well as the last 11 months before are shownEnd of the deletion

###

### Screenshots and other files

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/919367/content">

### Environment information

**OpenProject version**

Core build

[0cfbd60bfa80fdbdb9866ba6c2bd47c7a9e7e84a](https://qa.openproject-stage.com/external_redirect?url=https%3A%2F%2Fgithub.com%2Fopf%2Fopenproject%2Fcommits%2F0cfbd60bfa80fdbdb9866ba6c2bd47c7a9e7e84a)

Product version

[ecfbdd2facf738f725a89cda20e6909aaa4b155f](https://qa.openproject-stage.com/external_redirect?url=https%3A%2F%2Fgithub.com%2Fopf%2Fsaas-openproject%2Fcommits%2Fecfbdd2facf738f725a89cda20e6909aaa4b155f)

Core version

OpenProject 17.2.0

**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)