[Bug]: Schema compare failed: startIndex ('-1') must be a non-negative value.

[ltsyen]

Description

Executed schema compare from DB to local sql project.
Expected to update local sql project after hitting "apply" but got the following error instead:

Apply schema compare changes: Failed. 
startIndex ('-1') must be a non-negative value. (Parameter 'startIndex') 
Actual value was -1. startIndex ('-1') must be a non-negative value. (Parameter 'startIndex') Actual value was -1.

Steps to Reproduce

1. Started a schema compare
2. try to apply changes
3. Get error

Affected Area

• Connection dialog (SQL Server | Azure browse/Fabric browse)
• Query editor
• Query results panel
• Object Explorer
• GitHub Copilot integration
• Preview/Edit data
• Table Designer
• Schema Designer
• Schema Compare
• Local SQL Server Container provisioning
• SQL database in Fabric provisioning
• DACPAC/BACPAC export/import
• SQL Database projects
• Query Plan Visualizer
• Other (please describe below)

If you selected "Other", please describe the affected area

No response

Environment Information

• VS Code version:

Version: 1.106.3 (user setup)
Commit: bf9252a2fb45be6893dd8870c0bf37e2e1766d61
Date: 2025-11-25T22:28:18.024Z
Electron: 37.7.0
ElectronBuildId: 12781156
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26100

• mssql version:

Identifier: ms-mssql.mssql
Version: 1.37.1

• Connection type:
  • FROM:
    • Synapse serverless database
  • TO:
    • local sql project

Confirmation

• I have searched existing issues and couldn't find a match
• I want to work on this issue