Validation of units broken

[kraqbi]

Describe the bug 🐞
Hello!
The example here :
https://docs.sciml.ai/ModelingToolkit/stable/basics/Validation/#DynamicQuantities-Literals
Does not work as intended. Its goal is to validate the dimensionalitty of the equations according to the units given.

Expected behavior

It should return "true" but does return "false".

Minimal Reproducible Example 👇

using ModelingToolkit, DynamicQuantities
@parameters τ [unit = u"ms"]
@variables t [unit = u"ms"] E(t) [unit = u"kJ"] P(t) [unit = u"MW"]
D = Differential(t)
eqs = eqs = [D(E) ~ P - E / τ,
    0 ~ P]
ModelingToolkit.validate(eqs)

Error & Stacktrace ⚠️

┌ Warning:  in eq. #1right, in sum P(t) + (-E(t)) / τ, units [1.0e6 m² kg s⁻³, 1.0 m² kg s⁻³] do not match.
└ @ ModelingToolkit ~/.julia/packages/ModelingToolkit/US9uJ/src/systems/unit_check.jl:181
false

Environment (please complete the following information):

• Output of using Pkg; Pkg.status()

  [06fc5a27] DynamicQuantities v1.8.0
  [961ee093] ModelingToolkit v10.7.0

• Output of versioninfo()

Julia Version 1.11.5
Commit 760b2e5b739 (2025-04-14 06:53 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 20 × 13th Gen Intel(R) Core(TM) i7-13800H
  WORD_SIZE: 64
  LLVM: libLLVM-16.0.6 (ORCJIT, goldmont)
Threads: 1 default, 0 interactive, 1 GC (on 20 virtual cores)

Additional context

Question first raised here (https://discourse.julialang.org/t/unit-validation-and-inspection-with-mtk-error-in-the-documentation/112145) . Please tell me if I do not use the right form in that issue, this is my first time doing so.