Duplicate property

Reports duplicate property keys with different values, duplicate keys, or duplicate property values.

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

DuplicatePropertyInspection

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Properties files

Example:

property1=<font color="#000080">value</font>;
property2=<font color="#000080">value</font>;

The Options list allows selecting the area in which the inspection should search for duplicates.

Inspection ID: DuplicatePropertyInspection

Inspection options

Here you can find the description of settings available for the Duplicate property inspection, and the reference of their default values.

Analysis scope

Option ID:

SCOPE

Default value:

File

Other available settings:

Module
Project

Duplicate values

Option ID:

CHECK_DUPLICATE_VALUES

Default value:

Selected

Duplicate keys with different values

Option ID:

CHECK_DUPLICATE_KEYS_WITH_DIFFERENT_VALUES

Default value:

Selected

Duplicate keys

Option ID:

CHECK_DUPLICATE_KEYS

Default value:

Selected

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection DuplicatePropertyInspection

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.3, JetBrains Rider 2025.2, PyCharm 2025.3, Qodana for .NET 2025.2, Qodana for JVM 2025.3,

Last modified: 03 December 2025