diff --git a/src/ytdl_sub/validators/string_formatter_validators.py b/src/ytdl_sub/validators/string_formatter_validators.py
index eb422c00..ef4d272e 100644
--- a/src/ytdl_sub/validators/string_formatter_validators.py
+++ b/src/ytdl_sub/validators/string_formatter_validators.py
@@ -213,8 +213,9 @@ class OverridesStringFormatterValidator(StringFormatterValidator):
     """
 
     _variable_not_found_error_msg_formatter = (
-        "Override variable '{variable_name}' does not exist. "
-        "Available override variables: {available_fields}"
+        "Override variable '{variable_name}' does not exist. For this field, ensure your override "
+        "variable does not contain any source variables - it is a requirement that this be a "
+        "static string. Available override variables: {available_fields}"
     )
 
 
diff --git a/tests/unit/validators/test_string_formatter_validator.py b/tests/unit/validators/test_string_formatter_validator.py
index 9481ec2a..f0140de4 100644
--- a/tests/unit/validators/test_string_formatter_validator.py
+++ b/tests/unit/validators/test_string_formatter_validator.py
@@ -110,6 +110,8 @@ class TestStringFormatterValidator(object):
         if string_formatter_class == OverridesStringFormatterValidator:
             expected_error_msg = (
                 f"Validation error in test: Override variable 'bah_humbug' does not exist. "
+                f"For this field, ensure your override variable does not contain any source "
+                f"variables - it is a requirement that this be a static string. "
                 f"Available override variables: {', '.join(sorted(variable_dict.keys()))}"
             )