Statement parser error

[AlphaGeeKUK]

VSCode
Version: 1.99.2 (user setup)
Commit: 4949701c880d4bdb949e3c0e6b400288da7f474b
Date: 2025-04-10T01:21:25.295Z
Electron: 34.3.2
ElectronBuildId: 11161073
Chromium: 132.0.6834.210
Node.js: 20.18.3
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26100

NextBASIC
Identifier remysharp.nextbasic
Version 1.11.13

This line of code -

140 %l,%c+=%1

Is generating a Problem report -

Cannot redeclare integer expression whilst already inside one, "%"

It can be typed into a program line in CSpect and is accepted without error.