"Year established" value is not saved after editing

Description:
When editing a route and entering a value in the "Year established" field, the value appears to be accepted at first. However, after saving and reopening the edit view, the field is empty again. The entered value is not stored or displayed, indicating that the data is not being saved correctly.

Steps to reproduce:

1. Open a route in edit mode.

2. Enter a year in the "Year established" field.

3. Save the changes.

4. Reopen the edit screen for the same route.

5. Observe that the "Year established" field is empty.

Expected result:
The entered year should be saved and persist in the field when reopening the edit view.

Actual result:
The field is empty upon reopening, and the entered data is lost.

Platform:
Android 14