diff --git a/services/sheets_service.py b/services/sheets_service.py
index 7671e88..5695134 100644
--- a/services/sheets_service.py
+++ b/services/sheets_service.py
@@ -315,11 +315,19 @@ class SheetsService:
 
                     # Check for spreadsheet errors
                     if self._is_spreadsheet_error(value):
-                        self.logger.warning(
-                            f"Row {row_num}: Spreadsheet error '{value}' in field '{field_name}' - skipping row"
+                        raise SheetsException(
+                            f"❌ Spreadsheet Error Detected\n\n"
+                            f"**Location:** Row {row_num}, Column '{field_name}'\n"
+                            f"**Value Found:** `{value}`\n\n"
+                            f"This cell contains a formula error that must be fixed before submission.\n\n"
+                            f"**Common Error Types:**\n"
+                            f"• `#REF!` - Invalid cell reference (deleted row/column)\n"
+                            f"• `#N/A` - Lookup formula couldn't find a match\n"
+                            f"• `#VALUE!` - Wrong data type in formula\n"
+                            f"• `#DIV/0!` - Division by zero\n"
+                            f"• `#NAME?` - Unrecognized formula name\n\n"
+                            f"**Action Required:** Fix cell {field_name} in row {row_num} and resubmit."
                         )
-                        has_error = True
-                        break
 
                     # Sanitize integer fields
                     if field_name in int_fields: