1# Bundle Manager Subsystem Changelog 2 3## cl.bundlemanager.1 Verifying Signature Consistency When Installing a Preset Application That Has Been Uninstalled 4 5**Access Level** 6 7Public API 8 9**Reason for Change** 10 11After a preset application is uninstalled, an HAP with the same bundle name but different signatures can be installed, which poses security risks. 12 13**Change Impact** 14 15This change is a non-compatible change. 16 17Before change: After a preset application is uninstalled, an HAP with the same bundle name but different signatures can be installed. 18 19After change: After a preset application is uninstalled, an HAP with the same bundle name but different signatures fails to be installed. 20 21**Start API Level** 22 237 24 25**Change Since** 26 27OpenHarmony 5.0.0.54 28 29**Key API/Component Changes** 30 31Installation command provided by the [bm Tool](https://gitee.com/openharmony/docs/blob/master/en/application-dev/tools/bm-tool.md#installation-command) 32 33**Adaptation Guide** 34 35To install a preset application using the hdc command, the signature of the HAP to install must be the same as that of the preset HAP. 36