Notebook validation failed - notebook with widget- nbformat 5.0.4

I am getting following error over and over and have no idea what causes it!
`Notebook validation failed: {'model_id': '59d3b150e8eb4e44b6c0ce0030dfc2b7', 'version_major': 2, 'version_minor': 0} is not valid under any of the given schemas:
{
"model_id": "59d3b150e8eb4e44b6c0ce0030dfc2b7",
"version_major": 2,
"version_minor": 0
}`

I see following details when I run this command: `jupyter-jupyadmin@labs:~$ conda list`

> packages in environment at /opt/tljh/user:
> Name Version Build Channel
> _libgcc_mutex 0.1 conda_forge conda-forge
> _openmp_mutex 4.5 0_gnu conda-forge
> alembic 1.3.3 pypi_0 pypi
> asn1crypto 1.3.0 py36_0 conda-forge
> async-generator 1.10 pypi_0 pypi
> attrs 19.3.0 pypi_0 pypi
> backcall 0.1.0 pypi_0 pypi
> bleach 3.1.0 pypi_0 pypi
> boost-cpp 1.70.0 h8e57a91_2 conda-forge
> bzip2 1.0.8 h516909a_2 conda-forge
> ca-certificates 2019.11.28 hecc5488_0 conda-forge
> cairo 1.16.0 hfb77d84_1002 conda-forge
> certifi 2019.11.28 py36_0 conda-forge
> certipy 0.1.3 pypi_0 pypi
> cffi 1.13.2 py36h8022711_0 conda-forge
> cfitsio 3.470 hb60a0a2_2 conda-forge
> chardet 3.0.4 py36_1003 conda-forge
> conda 4.8.2 py36_0 conda-forge
> conda-env 2.6.0 h36134e3_1
> conda-package-handling 1.6.0 py36h516909a_1 conda-forge
> cryptography 2.8 py36h72c5cf5_1 conda-forge
> curl 7.65.3 hf8cf82a_0 conda-forge
> decorator 4.4.1 pypi_0 pypi
> defusedxml 0.6.0 pypi_0 pypi
> entrypoints 0.3 pypi_0 pypi
> expat 2.2.9 he1b5a44_2 conda-forge
> fontconfig 2.13.1 h86ecdb6_1001 conda-forge
> freetype 2.10.0 he983fc9_1 conda-forge
> freexl 1.0.5 h14c3975_1002 conda-forge
> gdal 3.0.4 py36hbb6b9fb_0 conda-forge
> geos 3.8.0 he1b5a44_0 conda-forge
> geotiff 1.5.1 h38872f0_8 conda-forge
> gettext 0.19.8.1 hc5be6a0_1002 conda-forge
> giflib 5.2.1 h516909a_1 conda-forge
> glib 2.58.3 py36h6f030ca_1002 conda-forge
> hdf4 4.2.13 hf30be14_1003 conda-forge
> hdf5 1.10.5 nompi_h3c11f04_1104 conda-forge
> icu 64.2 he1b5a44_1 conda-forge
> idna 2.8 py36_1000 conda-forge
> importlib-metadata 1.5.0 pypi_0 pypi
> ipykernel 5.1.4 pypi_0 pypi
> ipython 7.11.1 pypi_0 pypi
> ipython-genutils 0.2.0 pypi_0 pypi
> ipywidgets 7.4.2 pypi_0 pypi
> jedi 0.16.0 pypi_0 pypi
> jinja2 2.11.1 pypi_0 pypi
> jpeg 9c h14c3975_1001 conda-forge
> json-c 0.13.1 h14c3975_1001 conda-forge
> jsonschema 3.2.0 pypi_0 pypi
> jupyter-client 5.3.4 pypi_0 pypi
> jupyter-core 4.6.1 pypi_0 pypi
> jupyterhub 1.0.0 pypi_0 pypi
> jupyterlab 0.35.4 pypi_0 pypi
> jupyterlab-server 0.2.0 pypi_0 pypi
> kealib 1.4.10 h58c409b_1005 conda-forge
> krb5 1.16.4 h2fd8d38_0 conda-forge
> libblas 3.8.0 14_openblas conda-forge
> libcblas 3.8.0 14_openblas conda-forge
> libcurl 7.65.3 hda55be3_0 conda-forge
> libdap4 3.20.4 hd3bb157_0 conda-forge
> libedit 3.1.20170329 h6b74fdf_2
> libffi 3.2.1 hfc679d8_5 conda-forge
> libgcc-ng 9.2.0 h24d8f2e_2 conda-forge
> libgdal 3.0.4 h20022a4_0 conda-forge
> libgfortran-ng 7.3.0 hdf63c60_4 conda-forge
> libgomp 9.2.0 h24d8f2e_2 conda-forge
> libiconv 1.15 h516909a_1005 conda-forge
> libkml 1.3.0 h4fcabce_1010 conda-forge
> liblapack 3.8.0 14_openblas conda-forge
> libnetcdf 4.7.3 nompi_h9f9fd6a_101 conda-forge
> libopenblas 0.3.7 h5ec1e0e_6 conda-forge
> libpng 1.6.37 hed695b0_0 conda-forge
> libpq 12.1 hd9ab2ff_0 conda-forge
> libspatialite 4.3.0a ha48a99a_1034 conda-forge
> libssh2 1.8.2 h22169c7_2 conda-forge
> libstdcxx-ng 9.2.0 hdf63c60_2 conda-forge
> libtiff 4.1.0 hc3755c2_3 conda-forge
> libuuid 2.32.1 h14c3975_1000 conda-forge
> libwebp 1.0.2 h56121f0_5 conda-forge
> libxcb 1.13 h14c3975_1002 conda-forge
> libxml2 2.9.10 hee79883_0 conda-forge
> lz4-c 1.8.3 he1b5a44_1001 conda-forge
> mako 1.1.1 pypi_0 pypi
> markupsafe 1.1.1 pypi_0 pypi
> mistune 0.8.4 pypi_0 pypi
> nbconvert 5.6.1 pypi_0 pypi
> nbformat 5.0.4 pypi_0 pypi
> nbgitpuller 0.6.1 pypi_0 pypi
> nbresuse 0.3.0 pypi_0 pypi
> nbzip 0.1.0 pypi_0 pypi
> ncurses 6.1 hfc679d8_2 conda-forge
> notebook 5.7.8 pypi_0 pypi
> nteract-on-jupyter 2.0.7 pypi_0 pypi
> numpy 1.17.5 py36h95a1406_0 conda-forge
> oauthlib 3.1.0 pypi_0 pypi
> openjpeg 2.3.1 h981e76c_3 conda-forge
> openssl 1.1.1d h516909a_0 conda-forge
> pamela 1.0.0 pypi_0 pypi
> pandocfilters 1.4.2 pypi_0 pypi
> parso 0.6.0 pypi_0 pypi
> pcre 8.43 he1b5a44_0 conda-forge
> pexpect 4.8.0 pypi_0 pypi
> pickleshare 0.7.5 pypi_0 pypi
> pip 20.0.2 py36_1 conda-forge
> pixman 0.38.0 h516909a_1003 conda-forge
> poppler 0.67.0 h14e79db_8 conda-forge
> poppler-data 0.4.9 1 conda-forge
> postgresql 12.1 hc63931a_0 conda-forge
> proj 6.3.0 hc80f0dc_0 conda-forge
> prometheus-client 0.7.1 pypi_0 pypi
> prompt-toolkit 3.0.3 pypi_0 pypi
> psutil 5.6.7 pypi_0 pypi
> pthread-stubs 0.4 h14c3975_1001 conda-forge
> ptyprocess 0.6.0 pypi_0 pypi
> pycosat 0.6.3 py36h516909a_1002 conda-forge
> pycparser 2.19 py36_1 conda-forge
> pygments 2.5.2 pypi_0 pypi
> pyopenssl 19.0.0 py36_0 conda-forge
> pyrsistent 0.15.7 pypi_0 pypi
> pysocks 1.7.1 py36_0 conda-forge
> python 3.6.7 h357f687_1006 conda-forge
> python-dateutil 2.8.1 pypi_0 pypi
> python-editor 1.0.4 pypi_0 pypi
> pyzmq 18.1.1 pypi_0 pypi
> readline 8.0 hf8c457e_0 conda-forge
> requests 2.22.0 py36_1 conda-forge
> ruamel_yaml 0.15.80 py36h516909a_1000 conda-forge
> send2trash 1.5.0 pypi_0 pypi
> setuptools 45.1.0 py36_0 conda-forge
> six 1.14.0 py36_0 conda-forge
> sqlalchemy 1.3.13 pypi_0 pypi
> sqlite 3.30.1 hcee41ef_0 conda-forge
> tbb 2018.0.5 h2d50403_0 conda-forge
> terminado 0.8.3 pypi_0 pypi
> testpath 0.4.4 pypi_0 pypi
> tiledb 1.7.0 hcde45ca_2 conda-forge
> tk 8.6.10 hed695b0_0 conda-forge
> tornado 5.1.1 pypi_0 pypi
> tqdm 4.42.0 py_0 conda-forge
> traitlets 4.3.3 pypi_0 pypi
> tzcode 2019a h516909a_1002 conda-forge
> urllib3 1.25.7 py36_0 conda-forge
> wcwidth 0.1.8 pypi_0 pypi
> webencodings 0.5.1 pypi_0 pypi
> wheel 0.34.2 py36_0 conda-forge
> widgetsnbextension 3.4.2 pypi_0 pypi
> xerces-c 3.2.2 h8412b87_1004 conda-forge
> xorg-kbproto 1.0.7 h14c3975_1002 conda-forge
> xorg-libice 1.0.10 h516909a_0 conda-forge
> xorg-libsm 1.2.3 h84519dc_1000 conda-forge
> xorg-libx11 1.6.9 h516909a_0 conda-forge
> xorg-libxau 1.0.9 h14c3975_0 conda-forge
> xorg-libxdmcp 1.1.3 h516909a_0 conda-forge
> xorg-libxext 1.3.4 h516909a_0 conda-forge
> xorg-libxrender 0.9.10 h516909a_1002 conda-forge
> xorg-renderproto 0.11.1 h14c3975_1002 conda-forge
> xorg-xextproto 7.3.0 h14c3975_1002 conda-forge
> xorg-xproto 7.0.31 h14c3975_1007 conda-forge
> xz 5.2.4 h14c3975_1001 conda-forge
> yaml 0.2.2 h516909a_1 conda-forge
> zipp 2.1.0 pypi_0 pypi
> zlib 1.2.11 h516909a_1006 conda-forge
> zstd 1.4.4 h3b9ef0a_1 conda-forge

Also, checking the notebook metadata I see following information:
```
{
"anaconda-cloud": {},
"kernelspec": {
"name": "python3",
"display_name": "Python 3",
"language": "python"
},
"language_info": {
"name": "python",
"version": "3.6.7",
"mimetype": "text/x-python",
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"pygments_lexer": "ipython3",
"nbconvert_exporter": "python",
"file_extension": ".py"
},
"widgets": {
"state": {
"0fe728eba2e6465c9b452d2eb017fee1": {
"views": [
{
"cell_index": 26
}
]
},
"282b6d570ecd448d9ad1c8ac5ebf7b0f": {
"views": [
{
"cell_index": 40
}
]
}
},
"version": "1.2.0"
}
}
```