diff --git a/completions/bash/brew b/completions/bash/brew
index 035782f253..c35bc77b3a 100644
--- a/completions/bash/brew
+++ b/completions/bash/brew
@@ -1682,22 +1682,6 @@ _brew_post_install() {
   __brew_complete_installed_formulae
 }
 
-_brew_postgresql_upgrade_database() {
-  local cur="${COMP_WORDS[COMP_CWORD]}"
-  case "${cur}" in
-    -*)
-      __brewcomp "
-      --debug
-      --help
-      --quiet
-      --verbose
-      "
-      return
-      ;;
-    *) ;;
-  esac
-}
-
 _brew_postinstall() {
   local cur="${COMP_WORDS[COMP_CWORD]}"
   case "${cur}" in
@@ -2762,7 +2746,6 @@ _brew() {
     outdated) _brew_outdated ;;
     pin) _brew_pin ;;
     post_install) _brew_post_install ;;
-    postgresql-upgrade-database) _brew_postgresql_upgrade_database ;;
     postinstall) _brew_postinstall ;;
     pr-automerge) _brew_pr_automerge ;;
     pr-publish) _brew_pr_publish ;;
diff --git a/completions/fish/brew.fish b/completions/fish/brew.fish
index 328ac49715..e261de07e1 100644
--- a/completions/fish/brew.fish
+++ b/completions/fish/brew.fish
@@ -1153,13 +1153,6 @@ __fish_brew_complete_arg 'post_install' -l verbose -d 'Make some output more ver
 __fish_brew_complete_arg 'post_install' -a '(__fish_brew_suggest_formulae_installed)'
 
 
-__fish_brew_complete_cmd 'postgresql-upgrade-database' 'Upgrades the database for the `postgresql` formula'
-__fish_brew_complete_arg 'postgresql-upgrade-database' -l debug -d 'Display any debugging information'
-__fish_brew_complete_arg 'postgresql-upgrade-database' -l help -d 'Show this message'
-__fish_brew_complete_arg 'postgresql-upgrade-database' -l quiet -d 'Make some output more quiet'
-__fish_brew_complete_arg 'postgresql-upgrade-database' -l verbose -d 'Make some output more verbose'
-
-
 __fish_brew_complete_cmd 'postinstall' 'Rerun the post-install steps for formula'
 __fish_brew_complete_arg 'postinstall' -l debug -d 'Display any debugging information'
 __fish_brew_complete_arg 'postinstall' -l help -d 'Show this message'
diff --git a/completions/internal_commands_list.txt b/completions/internal_commands_list.txt
index b9ae55c71e..6c5b7423f3 100644
--- a/completions/internal_commands_list.txt
+++ b/completions/internal_commands_list.txt
@@ -69,7 +69,6 @@ options
 outdated
 pin
 post_install
-postgresql-upgrade-database
 postinstall
 pr-automerge
 pr-publish
diff --git a/completions/zsh/_brew b/completions/zsh/_brew
index cbdd6ad70e..174cffe167 100644
--- a/completions/zsh/_brew
+++ b/completions/zsh/_brew
@@ -191,7 +191,6 @@ __brew_internal_commands() {
     'options:Show install options specific to formula'
     'outdated:List installed casks and formulae that have an updated version available'
     'pin:Pin the specified formula, preventing them from being upgraded when issuing the `brew upgrade` formula command'
-    'postgresql-upgrade-database:Upgrades the database for the `postgresql` formula'
     'postinstall:Rerun the post-install steps for formula'
     'pr-automerge:Find pull requests that can be automatically merged using `brew pr-publish`'
     'pr-publish:Publish bottles for a pull request with GitHub Actions'
@@ -1434,15 +1433,6 @@ _brew_post_install() {
     '*::installed_formula:__brew_installed_formulae'
 }
 
-# brew postgresql-upgrade-database
-_brew_postgresql_upgrade_database() {
-  _arguments \
-    '--debug[Display any debugging information]' \
-    '--help[Show this message]' \
-    '--quiet[Make some output more quiet]' \
-    '--verbose[Make some output more verbose]'
-}
-
 # brew postinstall
 _brew_postinstall() {
   _arguments \