Daily PostgreSQL crash

Problem/Motivation

On one of my web sites, I'm getting the following error once a day:

Drupal\Core\Database\IntegrityConstraintViolationException: SQLSTATE[23502]: Not null violation: 7 ERROR: null value in column "id" of relation "cleantalk_sfw_temp" violates not-null constraint DETAIL: Failing row contains (null, 168430090, 4294967295, 0, 0).: INSERT INTO cleantalk_sfw_temp (network, mask, status, source) VALUES (168430090,4294967295,0,0),(1851333120,4294966784,0,0),(1964701696,4294966784,0,0),(463067136,4294966272,0,0),(462875648,4294966272,0,0),(532213248,4294967040,0,0),(3301187584,4294967040,0,0),(3729646592,4294966784,0,0),(2015483904,4294966784,0,0),(463458304,4294966272,0,0),(2043539456,4294966272,0,0),
...  long list of other values
(1737180234,4294967295,0,0),(1737180300,4294967295,0,0),(1737180419,4294967295,0,0),(1737203382,4294967295,0,0),(1737274667,4294967295,0,0),(1737284414,4294967295,0,0),(1737284505,4294967295,0,0),(1737362361,4294967295,0,0),(1737366167,4294967295,0,0),(1737444616,4294967295,0,0),(1737444687,4294967295,0,0); Array ( ) in Drupal\Core\Database\ExceptionHandler->handleExecutionException() (line 77  of /home/accdesign/public_html/web/core/lib/Drupal/Core/Database/ExceptionHandler.php)

Observations

I note that table cleantalk_sfw_temp has a column named id (which is not a serial field), which is not written to by the INSERT statement. Note that the very first set of values is what it dies on. Note that SFW is turned off in Cleantalk configuration.

Remaining tasks

User interface changes

API changes

Data model changes