Refine language for CTP-3096

lang/en/local_sitsgradepush.php

@@ -148,8 +148,8 @@
 $string['error:submission_log_transfer_failed'] = 'Submission Transfer failed.';
 $string['error:grade_items_not_found'] = 'Grade items not found.';
 $string['error:gradetype_not_supported'] = 'Marking {$a} are not currently supported.';
-$string['error:cannot_change_source'] = 'Cannot change source due to existing transfer records or running tasks for this assessment component.';
-$string['error:mks_scheme_not_supported'] = 'Mark scheme is not eligible for marks transfer';
+$string['error:cannot_change_source'] = 'Cannot change source as marks have already been transferred for this assessment component.';
+$string['error:mks_scheme_not_supported'] = 'Marking Scheme is not supported for marks transfer';
 $string['error:ast_code_not_supported'] = 'Assessment Type is not expected to take place in Moodle';
 $string['error:ast_code_exam_room_code_not_matched'] = 'Centrally managed exam NOT due to take place in Moodle';
 $string['error:mab_invalid_for_mapping'] = 'This assessment component is not valid for mapping due to the following reasons: {$a}.';