Spyder 6.0 - warning is treated as an error when starting console

Issue Report Checklist

[x] Searched the issues page for similar reports
[ ] Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
[x] Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
[ ] Could not reproduce inside jupyter qtconsole (if console-related)
[ ] Tried basic troubleshooting (if a bug/error)
- [x] Restarted Spyder
- [ ] Reset preferences with spyder --reset
- [ ] Reinstalled the latest version of Anaconda
- [ ] Tried the other applicable steps from the Troubleshooting Guide
[ ] Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

The console panel seems to treat warnings as errors. Because of this I can't use the console because I have a warning at startup:

I think I opened a very similar issue in the past and it was resolved (but I couldn't find it now). Such warnings did not break console in Spyder 5 (I used it today before updating).

What steps reproduce the problem?

Have import scipt set up in spyder that imports a package that produces a warning
Switch from Spyder 5 to Spyder 6
Start Spyder

What is the expected output? What do you see instead?

Console works even though a warning was raised by the imported package.

Versions

Spyder version: 6.0.0 (conda)
Python version: 3.11.9 64-bit
Qt version: 5.15.8
PyQt5 version: 5.15.9
Operating System: Windows-10-10.0.22631-SP0 (Windows 11 Home)

Dependencies

# Mandatory:
aiohttp >=3.9.3                  :  3.10.5 (OK)
asyncssh >=2.14.0,<3.0.0         :  2.17.0 (OK)
atomicwrites >=1.2.0             :  1.4.1 (OK)
chardet >=2.0.0                  :  5.2.0 (OK)
cloudpickle >=0.5.0              :  3.0.0 (OK)
cookiecutter >=1.6.0             :  2.6.0 (OK)
diff_match_patch >=20181111      :  20230430 (OK)
github >=2.3.0                   :  2.4.0 (OK)
importlib_metadata >=4.6.0       :  8.4.0 (OK)
intervaltree >=3.0.2             :  3.1.0 (OK)
IPython >=8.13.0,<9.0.0,!=8.17.1 :  8.27.0 (OK)
jedi >=0.17.2,<0.20.0            :  0.19.1 (OK)
jellyfish >=0.7                  :  1.1.0 (OK)
jsonschema >=3.2.0               :  4.23.0 (OK)
keyring >=17.0.0                 :  25.3.0 (OK)
nbconvert >=4.0                  :  7.16.4 (OK)
numpydoc >=0.6.0                 :  1.8.0 (OK)
parso >=0.7.0,<0.9.0             :  0.8.4 (OK)
pexpect >=4.4.0                  :  4.9.0 (OK)
pickleshare >=0.4                :  0.7.5 (OK)
psutil >=5.3                     :  6.0.0 (OK)
pygments >=2.0                   :  2.18.0 (OK)
pylint >=3.1,<4                  :  3.2.3 (OK)
pylint_venv >=3.0.2              :  3.0.3 (OK)
pyls_spyder >=0.4.0              :  0.4.0 (OK)
pylsp >=1.12.0,<1.13.0           :  1.12.0 (OK)
pylsp_black >=2.0.0,<3.0.0       :  2.0.0 (OK)
pyuca >=1.2                      :  1.2 (OK)
qdarkstyle >=3.2.0,<3.3.0        :  3.2.3 (OK)
qstylizer >=0.2.2                :  0.2.3 (OK)
qtawesome >=1.3.1,<1.4.0         :  1.3.1 (OK)
qtconsole >=5.6.0,<5.7.0         :  5.6.0 (OK)
qtpy >=2.4.0                     :  2.4.1 (OK)
rtree >=0.9.7                    :  1.3.0 (OK)
setuptools >=49.6.0              :  73.0.1 (OK)
sphinx >=0.6.6                   :  8.0.2 (OK)
spyder_kernels >=3.0.0,<3.1.0    :  3.0.0 (OK)
superqt >=0.6.2,<1.0.0           :  0.6.7 (OK)
textdistance >=4.2.0             :  4.6.2 (OK)
three_merge >=0.1.1              :  0.1.1 (OK)
watchdog >=0.10.3                :  5.0.1 (OK)
yarl >=1.9.4                     :  1.9.11 (OK)
zmq >=24.0.0                     :  26.2.0 (OK)

# Optional:
cython >=0.21                    :  None (NOK)
matplotlib >=3.0.0               :  None (NOK)
numpy >=1.7                      :  1.24.2 (OK)
pandas >=1.1.1                   :  1.5.3 (OK)
scipy >=0.17.0                   :  None (NOK)
sympy >=0.7.3                    :  None (NOK)

spyder-ide / spyder

Spyder 6.0 - warning is treated as an error when starting console #22447