Modern UX API-1019 error while adding task in 15.8.1

Products

• Clarity PPM On Premise

Issue/Introduction

We are getting below error while adding task in modern UX in 15.8.1

API-1019: could not process the request due to internal error

Error in app-ca.log

ERROR 2020-08-19 09:12:02,955 [http-nio-80-exec-4] ppm.rest (clarity:USER52:SESSION_NUMBER:PPM_REST_API) Exception processing request for resource [timeEntries], query string [/timesheets/19846002/timeEntries]
java.lang.NullPointerException

We have checked and this error is not related with wbs sequence issue.

User is able to add the task in classic.

Environment

Release : 15.8.1

Component : PPM INVESTMENTS, PROJECTS, RESOURCES & NPIO MANAGEMENT

Resolution

Issue was caused by duplicate entries in the PRCALENDAR table, to resolve it we had to delete duplicates from PRCALENDAR table retaining MAX PRID record.