GitHub integration with suspended User

Hi,
i have to support a Jenkins Installation, where are some Jobs with GitHub Pipeline SCM Integration. This was used with a User Login to GitHub. That user was removed recently from Github, as he left the Company, so we tried several ways with Github App and New User Credentials, but the Error is not going away and still shows “Your Account is suspended.”
So it seems there is another place with the old credentials, but I do not know where.

Error:
Failed to connect to repository : Command “E:\Git\bin\git.exe ls-remote -h – https://github.com/****.git HEAD” returned status code 128:
stdout:
stderr: remote: Your account is suspended. Please visit ttps://support.github.com for more information.
fatal: unable to access ‘https://github.com/******.git/’: The requested URL returned error: 403

The error is always the same, regardless of what credential I select in the Pipeline Config of the Job

Jenkins setup:Jenkins: 2.452.3
OS: Windows Server 2019 - 10.0
Java: 17.0.6 - Eclipse Adoptium (OpenJDK 64-Bit Server VM)

ace-editor:1.1
ant:497.v94e7d9fffa_b_9
antisamy-markup-formatter:162.v0e6ec0fcfcf6
apache-httpcomponents-client-4-api:4.5.14-208.v438351942757
bootstrap4-api:4.6.0-6
bootstrap5-api:5.3.2-3
bouncycastle-api:2.30.1.78.1-233.vfdcdeb_0a_08a_a_
branch-api:2.1144.v1425d1c3d5a_7
build-timeout:1.32
build-timestamp:1.0.3
caffeine-api:3.1.8-133.v17b_1ff2e0599
checks-api:2.0.2
cloudbees-folder:6.858.v898218f3609d
command-launcher:107.v773860566e2e
commons-lang3-api:3.13.0-62.v7d18e55f51e2
commons-text-api:1.11.0-95.v22a_d30ee5d36
config-file-provider:968.ve1ca_eb_913f8c
credentials:1311.vcf0a_900b_37c2
credentials-binding:657.v2b_19db_7d6e6d
data-tables-api:1.13.8-2
display-url-api:2.200.vb_9327d658781
durable-task:543.v262f6a_803410
echarts-api:5.4.3-2
email-ext:2.104
font-awesome-api:6.5.1-2
git:5.2.1
git-client:4.6.0
git-server:114.v068a_c7cc2574
github:1.37.3.1
github-api:1.318-461.v7a_c09c9fa_d63
github-branch-source:1772.va_69eda_d018d4
github-oauth:597.ve0c3480fcb_d0
gradle:2.9
gson-api:2.10.1-15.v0d99f670e0a_7
h2-api:11.1.4.199-12.v9f4244395f7a_
handlebars:3.0.8
instance-identity:185.v303dc7c645f9
ionicons-api:56.v1b_1c8c49374e
jackson2-api:2.16.1-373.ve709c6871598
jakarta-activation-api:2.1.3-1
jakarta-mail-api:2.1.3-1
javax-activation-api:1.2.0-6
javax-mail-api:1.6.2-9
jaxb:2.3.9-1
jdk-tool:73.vddf737284550
jjwt-api:0.11.5-77.v646c772fddb_0
jnr-posix-api:3.1.18-1
joda-time-api:2.12.6-21.vca_fd74418fb_7
jquery-detached:1.2.1
jquery3-api:3.7.1-1
jsch:0.2.16-86.v42e010d9484b_
json-path-api:2.9.0-33.v2527142f2e1d
junit:1265.v65b_14fa_f12f0
ldap:711.vb_d1a_491714dc
lockable-resources:1232.v512d6c434eb_d
mailer:472.vf7c289a_4b_420
matrix-auth:3.2.2
matrix-project:822.824.v14451b_c0fd42
mina-sshd-api-common:2.12.0-90.v9f7fb_9fa_3d3b_
mina-sshd-api-core:2.12.0-90.v9f7fb_9fa_3d3b_
momentjs:1.1.1
monitoring:1.95.0
okhttp-api:4.11.0-157.v6852a_a_fa_ec11
pam-auth:1.10
pipeline-build-step:540.vb_e8849e1a_b_d8
pipeline-github-lib:42.v0739460cda_c4
pipeline-graph-analysis:202.va_d268e64deb_3
pipeline-groovy-lib:704.vc58b_8890a_384
pipeline-input-step:477.v339683a_8d55e
pipeline-maven:1368.vfb_8509d7b_869
pipeline-maven-api:1368.vfb_8509d7b_869
pipeline-milestone-step:111.v449306f708b_7
pipeline-model-api:2.2175.v76a_fff0a_2618
pipeline-model-definition:2.2175.v76a_fff0a_2618
pipeline-model-extensions:2.2175.v76a_fff0a_2618
pipeline-rest-api:2.34
pipeline-stage-step:305.ve96d0205c1c6
pipeline-stage-tags-metadata:2.2175.v76a_fff0a_2618
pipeline-stage-view:2.34
plain-credentials:143.v1b_df8b_d3b_e48
plugin-util-api:3.8.0
popper-api:1.16.1-3
popper2-api:2.11.6-4
resource-disposer:0.23
scm-api:683.vb_16722fb_b_80b_
script-security:1313.v7a_6067dc7087
snakeyaml-api:2.2-111.vc6598e30cc65
ssh-credentials:308.ve4497b_ccd8f4
ssh-slaves:2.948.vb_8050d697fec
sshd:3.322.v159e91f6a_550
structs:337.v1b_04ea_4df7c8
thinBackup:1.18
timestamper:1.26
token-macro:400.v35420b_922dcb_
trilead-api:2.142.v748523a_76693
variant:60.v7290fc0eb_b_cd
workflow-aggregator:596.v8c21c963d92d
workflow-api:1283.v99c10937efcb_
workflow-basic-steps:1042.ve7b_140c4a_e0c
workflow-cps:3853.vb_a_490d892963
workflow-durable-task-step:1317.v5337e0c1fe28
workflow-job:1385.vb_58b_86ea_fff1
workflow-multibranch:773.vc4fe1378f1d5
workflow-scm-step:415.v434365564324
workflow-step-api:657.v03b_e8115821b_
workflow-support:865.v43e78cc44e0d
ws-cleanup:0.45