Hi,

You can disable the form view of that one2many field by defining  style="pointer-events:none;".
For example you can refer the following code

<field name="line_ids"  style="pointer-events:none;">
    <tree string="Lines"  editable="bottom">
         <field name="serial_no"/>
         <field name="name"/>
         <field name="category_id"/>
         <field name="child_id"/>
    </tree>
 </field>

But after using this option you cant edit the field.

Refer https://stackoverflow.com/questions/51321569/how-to-restrict-disable-the-form-view-while-click-tree-view-of-one2many-field-i

Thanks