Error: Undefined array key excludeField in Classes/Service/ObjectSchemaBuilder.php line 165

[t3rookie]

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Describe the bug I have a clean T3 (v12.4.16) with bootstrap_package (v14.0.7) and extension_builder (v12.0.0-beta.2). This is a composer installation. When I create a new extension with extension builder, when I filled all fields and have two nodes with one relation I get the following error: "{"error":"PHP Warning: Undefined array key "excludeField" in vendor/friendsoftypo3/extension-builder/Classes/Service/ObjectSchemaBuilder.php line 165"}

To Reproduce Steps to reproduce the behavior:

1. I go to extension builder
2. Click on new
3. Fill al fields
4. create two nodes
5. When i want to save, I get error ""{"error":"PHP Warning: Undefined array key "excludeField" in vendor/friendsoftypo3/extension-builder/Classes/Service/ObjectSchemaBuilder.php line 165"}
6. Also the red node delete button on top right corner of the node, does not work.

Expected behavior is, that extension should save without displaying errors ;-)

TYPO3 Version T3 (v12.4.16) / composer installation

Extension Builder Version: extension_builder (v12.0.0-beta.2 )

Browser Firefox 127.0.2 (64bit) on Win11Pro

Additional context none