"Start" and "Stop" Times not Saved When Creating Relationships

[securitiz]

Description

When creating a relationship between two objects, analysts have an opportunity to set a Start and Stop date, characterising the relationship temporally. However, after setting the dates and creating the relationship, the dates don't appear to be saved.
This is confirmed by selecting the relationship in the Knowledge graph - the Start date is set to 12/31/1969, and there is no Stop time.

Environment

1. OS (where OpenCTI server runs): Ubuntu 24
2. OpenCTI version: OpenCTI 4.2.1
3. OpenCTI client: frontend
4. Other environment details:

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Go to a Knowledge graph in a report,
2. Create a Relationship between two objects, set a Start (1/1/2020) and Stop (2/2/2020) time. Save the relationship
3. Select the relationship itself in the Knowledge graph (e.g. "uses")
4. Click the edit button to edit the relationship

Expected Output

The Start date is the date originally set (1/1/2020). The Stop date is consistent with the date previously set (2/2/2020)

Actual Output

The Start date resets to 12/31/1969. The Stop date is blank.

Additional information

Changing the Start and Stop dates back to the originally specified dates appears to work, and doesn't reset.