New Snippets

snippets/hr_timesheet.hr_timesheet_line_tree.x_parent_id_display_name.xml

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+<?xml version="1.0"?>
+<data inherit_id="hr_timesheet.hr_timesheet_line_tree" priority="50">
+    <xpath expr="//field[@name='task_id']" position="before">
+        <field name="x_parent_id_display_name" optional="hide"/>
+    </xpath>
+</data>

snippets/ir_model.account_analytic_line.x_parent_id_display_name.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <record id="x_parent_id_display_name" model="ir.model.fields">
+        <field name="field_description">Übergeordnete Aufgabe</field>
+        <field name="model">account.move.line</field>
+        <field name="model_id" ref="account.model_account_analytic_line"/>
+        <field name="name">x_parent_id_display_name</field>
+        <field name="readonly" eval="True"/>
+        <field name="store" eval="True"/>
+        <field name="copied" eval="False"/>
+        <field name="ttype">char</field>
+        <field name="related">task_id.parent_id.display_name</field>        
+    </record>
+</odoo>