[gitlab-ce docker] What's mean PG::IoError: Could not read block 0 :Input/Output eror

I installed gitlab-ce by docker with GitLab Official image from DockerHub.
I completed installation without error but if I click “Issues” in project page, web page is 500 done.
and print next logs.
I have question what is PG::IoError: coud not read block 0 “base/16385/16914”:Input/output error?
How can I solve this problem?

==> /var/log/gitlab/gitlab-rails/production.log <==
Completed 500 Internal Server Error in 1226ms (ActiveRecord: 1114.0ms)

ActionView::Template::Error (PG::IoError: ERROR: could not read block 0 in file “base/16385/16914”: Input/output error
: SELECT COUNT(*) FROM “notes” WHERE “notes”.“noteable_id” = $1 AND “notes”.“noteable_type” = $2 AND “notes”.“system” = $3):
15: %li
16: = link_to_member(@project, issue.assignee, name: false, title: “Assigned to :name”)
18: - note_count = issue.notes.user.count
19: - if note_count > 0
20: %li
21: = link_to issue_path(issue) + “#notes” do
app/views/projects/issues/_issue.html.haml:18:in _app_views_projects_issues__issue_html_haml__4094479554427369209_65924700' app/views/projects/issues/_issues.html.haml:2:in _app_views_projects_issues__issues_html_haml__2043712360092681619_65431740’
app/views/projects/issues/index.html.haml:26:in _app_views_projects_issues_index_html_haml___607289066956223778_63237420' app/controllers/projects/issues_controller.rb:36:in index’