[Due for payment 2025-09-19] Expense - Amount in the merged expense in self DM shows negative value

[mitarachim]

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Version Number: 9.1.91-0
Reproducible in staging?: Yes
Reproducible in production?: N/A - new feature, doesn't exist in prod
If this was caught during regression testing, add the test name, ID and link from TestRail: #65596
Email or phone of affected tester (no customers): jsdknjsoisd@gmail.com
Issue reported by: Applause Internal Team
Device used: Mac 15.5 / Chrome
App Component: Money Requests

Action Performed:

Precondition:

• Account has self DM.

1. Go to staging.new.expensify.com
2. Go to workspace chat.
3. Submit an expense to the workspace.
4. Go to self DM.
5. Track a manual expense in self DM.
6. Open the transaction thread in self DM.
7. Click More > Merge.
8. Select the workspace expense > Next.
9. Select the amount from the workspace expense in Step 3.
10. Select any option for other fields.
11. Click Continue.
12. Click Merge expenses.

Expected Result:

The amount in the merged expense in self DM will not show negative value.

Actual Result:

The amount in the merged expense in self DM shows negative value.

Workaround:

Unknown

Platforms:

• Android: App
• Android: mWeb Chrome
• iOS: App
• iOS: mWeb Safari
• iOS: mWeb Chrome
• Windows: Chrome
• MacOS: Chrome / Safari
• MacOS: Desktop

Screenshots/Videos

Bug6910998_1754620669469.20250808_102809.mp4

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Issue Owner

Current Issue Owner: @strepanier03

[github-actions]

👋 Friendly reminder that deploy blockers are time-sensitive ⏱ issues! Check out the open `StagingDeployCash` deploy checklist to see the list of PRs included in this release, then work quickly to do one of the following:

1. Identify the pull request that introduced this issue and revert it.
2. Find someone who can quickly fix the issue.
3. Fix the issue yourself.

[melvin-bot]

Triggered auto assignment to @arosiclair (DeployBlockerCash), see https://stackoverflowteams.com/c/expensify/questions/9980/ for more details.

[melvin-bot]

Triggered auto assignment to @strepanier03 (Bug), see https://stackoverflow.com/c/expensify/questions/14418 for more details. Please add this bug to a GH project, as outlined in the SO.

[melvin-bot]

💬 A slack conversation has been started in #expensify-open-source