Error Deleting Roadmap once a Picklist is associated with it

Products

• Clarity PPM SaaS
• Clarity PPM On Premise

Issue/Introduction

We are unable to delete a roadmap or picklist in the Clarity PPM New User Experience (UX) once the picklist is created and associated with the grid view. The error displayed when trying to delete the roadmap or picklist is Rdm.cannotDeletePicklists

Steps to Reproduce: 

1. Create a Roadmap
2. Create a custom picklist
3. Add it to grid view
4. Now even if you remove the field from grid view, then try to delete the picklist or the roadmap, you are unable to do it.

Excerpt of error in app-ca.logs: 

ERROR 2019-05-07 15:04:44,104 ppm.rest (clarity:user:......:PPM_REST_API) Error deleting picklist
java.lang.ClassCastException: class java.math.BigDecimal cannot be cast to class java.lang.Long (java.math.BigDecimal and java.lang.Long are in module java.base of loader 'bootstrap')

Environment

Release:
Component: PPMPRM

Resolution

This issue is no longer reproducible in 15.6.