Fixed #10892 - MySQL 8 compatibilty requires primary key

Signed-off-by: snipe <snipe@snipe.net>

database/migrations/2022_04_05_135340_add_primary_key_to_custom_fields_pivot.php

@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddPrimaryKeyToCustomFieldsPivot extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('custom_field_custom_fieldset', function (Blueprint $table) {
+            $table->bigIncrements('id')->first();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('custom_field_custom_fieldset', function (Blueprint $table) {
+            if (Schema::hasColumn('custom_field_custom_fieldset', 'id')) {
+                $table->dropColumn('id');
+            }
+        });
+    }
+}