diff --git a/public/include/config/error_codes.inc.php b/public/include/config/error_codes.inc.php
index 5eda21da..518bed00 100644
--- a/public/include/config/error_codes.inc.php
+++ b/public/include/config/error_codes.inc.php
@@ -66,4 +66,5 @@ $aErrorCodes['E0059'] = 'Worker already exists';
 $aErrorCodes['E0060'] = 'Failed to add new worker';
 $aErrorCodes['E0061'] = 'Failed to delete worker';
 $aErrorCodes['E0062'] = 'Block has no share_id, not running payouts';
+$aErrorCodes['E0063'] = 'Upstream share already assigned to previous block';
 ?>