Create New User error: An exception occurred

Dear all,

When I attempt to create a new user, I receive the error:

An exception occurred

Sorry! The system failed to execute the operation. Usually, no data is lost and you can continue working by going back to the previous page.

The log contains this:

p.org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [secret]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement

at org.springframework.orm.hibernate5.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:241)

Caused by: org.hibernate.exception.ConstraintViolationException: could not execute statement

at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:112)

at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)

Caused by: org.postgresql.util.PSQLException: ERROR: null value in column “secret” violates not-null constraint

Detail: Failing row contains (614731, ZszWxT3M8UX, null, 2018-10-10 19:17:47.078, 2018-10-10 19:17:47.487, 50, 50, xdfdgrtrthff001, $2a$10$Ynj1r3231cJFy6QeNSUpNu8u0CiCFLFc6W3cIl3Qw8Qr6/FZrl8wa, f, null, null, 2018-10-10 19:17:47.078, null, null, null, null, f, f, f, null, null).

Kindly assist with a solution, thanks.

Dr David