Error: found in Chart.yaml, but missing in charts/ directory: mysql

I have added mysql in requirements.yaml. Helm dependency downloads the mysql chart

helm dependency update
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "nginx" chart repository
...Successfully got an update from the "stable" chart repository

Update Complete. ⎈Happy Helming!⎈
Saving 1 charts
Downloading mysql from repo <our private repository>
Deleting outdated charts

But when I do helm install my_app_chart ../my_app_chart It gives error

Error: found in Chart.yaml, but missing in charts/ directory: mysql

Solution

I updated .helmignore

# Patterns to ignore when building packages.
# This supports shell glob matching, relative path matching, and
# negation (prefixed with !). Only one pattern per line.
.DS_Store
# Common VCS dirs
.git/
.gitignore
.bzr/
.bzrignore
.hg/
.hgignore
.svn/
# Common backup files
*.swp
*.bak
*.tmp
*~
# Various IDEs
.project
.idea/
*.tmproj
.vscode/
charts/

It contained charts/ I removed the entry and it worked

# Patterns to ignore when building packages.
# This supports shell glob matching, relative path matching, and
# negation (prefixed with !). Only one pattern per line.
.DS_Store
# Common VCS dirs
.git/
.gitignore
.bzr/
.bzrignore
.hg/
.hgignore
.svn/
# Common backup files
*.swp
*.bak
*.tmp
*~
# Various IDEs
.project
.idea/
*.tmproj
.vscode/