MCP Occurrence-Felder beim Schreiben übernehmen

modules/market_management/mcp.php

@@ -215,6 +215,7 @@ function market_management_mcp_get_market(PDO $pdo, int $marketId, bool $include
 
 function market_management_mcp_update_occurrence(PDO $pdo, int $occurrenceId, array $input): array
 {
+    unset($input['occurrence_id']);
     $simpleCostFields = [];
     foreach (['gross_cost', 'cost_items_text', 'tax_status', 'tax_rate'] as $field) {
         if (array_key_exists($field, $input)) {