diff --git a/slack_sdk/oauth/installation_store/amazon_s3/__init__.py b/slack_sdk/oauth/installation_store/amazon_s3/__init__.py
index c5c420f12..9a915c77c 100644
--- a/slack_sdk/oauth/installation_store/amazon_s3/__init__.py
+++ b/slack_sdk/oauth/installation_store/amazon_s3/__init__.py
@@ -106,7 +106,7 @@ def save(self, installation: Installation):
 
     def save_bot(self, bot: Bot):
         if bot.bot_token is None:
-            self.logger.debug("Skipped saving a new row because of the absense of bot token in it")
+            self.logger.debug("Skipped saving a new row because of the absence of bot token in it")
             return
 
         none = "none"
@@ -273,7 +273,7 @@ def delete_bot(self, *, enterprise_id: Optional[str], team_id: Optional[str]) ->
                         Key=content.get("Key"),
                     )
                 except Exception as e:
-                    message = f"Failed to find bot installation data for enterprise: {e_id}, team: {t_id}: {e}"
+                    message = f"Failed to delete bot installation data for enterprise: {e_id}, team: {t_id}: {e}"
                     raise SlackClientConfigurationError(message)
 
     async def async_delete_installation(
@@ -316,7 +316,7 @@ def delete_installation(
                     )
                     deleted_keys.append(key)
                 except Exception as e:
-                    message = f"Failed to find bot installation data for enterprise: {e_id}, team: {t_id}: {e}"
+                    message = f"Failed to delete installation data for enterprise: {e_id}, team: {t_id}: {e}"
                     raise SlackClientConfigurationError(message)
 
                 try:
@@ -328,7 +328,7 @@ def delete_installation(
                         )
                         deleted_keys.append(no_user_id_key)
                 except Exception as e:
-                    message = f"Failed to find bot installation data for enterprise: {e_id}, team: {t_id}: {e}"
+                    message = f"Failed to delete installation data for enterprise: {e_id}, team: {t_id}: {e}"
                     raise SlackClientConfigurationError(message)
 
         # Check the remaining installation data
@@ -347,5 +347,5 @@ def delete_installation(
                     Key=content.get("Key"),
                 )
             except Exception as e:
-                message = f"Failed to find bot installation data for enterprise: {e_id}, team: {t_id}: {e}"
+                message = f"Failed to delete installation data for enterprise: {e_id}, team: {t_id}: {e}"
                 raise SlackClientConfigurationError(message)
diff --git a/slack_sdk/oauth/installation_store/async_cacheable_installation_store.py b/slack_sdk/oauth/installation_store/async_cacheable_installation_store.py
index 935d24fe4..4edc638ef 100644
--- a/slack_sdk/oauth/installation_store/async_cacheable_installation_store.py
+++ b/slack_sdk/oauth/installation_store/async_cacheable_installation_store.py
@@ -98,7 +98,8 @@ async def async_delete_bot(
             team_id=team_id,
         )
         key = f"{enterprise_id or ''}-{team_id or ''}"
-        self.cached_bots.pop(key)
+        if key in self.cached_bots:
+            self.cached_bots.pop(key)
 
     async def async_delete_installation(
         self,
diff --git a/slack_sdk/oauth/installation_store/file/__init__.py b/slack_sdk/oauth/installation_store/file/__init__.py
index e178048b4..aa6f6c52d 100644
--- a/slack_sdk/oauth/installation_store/file/__init__.py
+++ b/slack_sdk/oauth/installation_store/file/__init__.py
@@ -78,7 +78,7 @@ def save(self, installation: Installation):
 
     def save_bot(self, bot: Bot):
         if bot.bot_token is None:
-            self.logger.debug("Skipped saving a new row because of the absense of bot token in it")
+            self.logger.debug("Skipped saving a new row because of the absence of bot token in it")
             return
 
         none = "none"
diff --git a/slack_sdk/oauth/installation_store/sqlite3/__init__.py b/slack_sdk/oauth/installation_store/sqlite3/__init__.py
index 6e65805fe..42f9c6ad8 100644
--- a/slack_sdk/oauth/installation_store/sqlite3/__init__.py
+++ b/slack_sdk/oauth/installation_store/sqlite3/__init__.py
@@ -217,7 +217,7 @@ def save(self, installation: Installation):
 
     def save_bot(self, bot: Bot):
         if bot.bot_token is None:
-            self.logger.debug("Skipped saving a new row because of the absense of bot token in it")
+            self.logger.debug("Skipped saving a new row because of the absence of bot token in it")
             return
 
         with self.connect() as conn: