BUG #14962: missing chunk number 0 for toast value 1086251 in pg_toast_2619

The following bug has been logged on the website:

Bug reference: 14962
Logged by: Raghav Rao
Email address: raghavendrajsv@gmail.com
PostgreSQL version: Unsupported/Unknown
Operating system: Centos
Description:

Below log is observed in several times in log file. Please help me ,How to
fix ,why this issue will occur and how to prevent it.

missing chunk number 0 for toast value 1086251 in pg_toast_2619