Length value is not removed when changing a column's type

CREATE TABLE `test` (
 `id` bigint NOT NULL AUTO_INCREMENT,
  `publish_time` bigint(20) null,
  PRIMARY KEY (`id`)
);

alter table test modify publish_time datetime NULL DEFAULT '1970-01-01 00:00:00';

org.apache.kafka.connect.errors.ConnectException: An exception occurred in the change event producer. This connector will be stopped. 
at io.debezium.pipeline.ErrorHandler.setProducerThrowable(ErrorHandler.java:50) 
at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.handleEvent(MySqlStreamingChangeEventSource.java:374) 
at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.lambda$execute$25(MySqlStreamingChangeEventSource.java:875) 
at com.github.shyiko.mysql.binlog.BinaryLogClient.notifyEventListeners(BinaryLogClient.java:1125) 
at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:973) 
at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:599) 
at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:857) 
at java.base/java.lang.Thread.run(Thread.java:830) 
Caused by: io.debezium.DebeziumException: Error processing binlog event ... 7 more 
Caused by: io.debezium.DebeziumException: java.lang.IllegalArgumentException: Maximum width must be from 1 to 9 inclusive but was 20 at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.lambda$handleQueryEvent$2(MySqlStreamingChangeEventSource.java:586) 
at io.debezium.pipeline.EventDispatcher.dispatchSchemaChangeEvent(EventDispatcher.java:302) 
at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.handleQueryEvent(MySqlStreamingChangeEventSource.java:581) 
at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.lambda$execute$14(MySqlStreamingChangeEventSource.java:847) 
at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.handleEvent(MySqlStreamingChangeEventSource.java:354) ... 6 more 
Caused by: java.lang.IllegalArgumentException: Maximum width must be from 1 to 9 inclusive but was 20 
at java.base/java.time.format.DateTimeFormatterBuilder$FractionPrinterParser.<init>(DateTimeFormatterBuilder.java:3087) 
at java.base/java.time.format.DateTimeFormatterBuilder.appendFraction(DateTimeFormatterBuilder.java:707) 
at io.debezium.connector.mysql.MySqlDefaultValueConverter.timestampFormat(MySqlDefaultValueConverter.java:350) 
at io.debezium.connector.mysql.MySqlDefaultValueConverter.convertToLocalDateTime(MySqlDefaultValueConverter.java:226) 
at io.debezium.connector.mysql.MySqlDefaultValueConverter.convert(MySqlDefaultValueConverter.java:143) 
at io.debezium.connector.mysql.MySqlDefaultValueConverter.parseDefaultValue(MySqlDefaultValueConverter.java:94) 
at io.debezium.relational.TableSchemaBuilder.lambda$addField$9(TableSchemaBuilder.java:367) 
at java.base/java.util.Optional.flatMap(Optional.java:287) 
at io.debezium.relational.TableSchemaBuilder.addField(TableSchemaBuilder.java:367) 
at io.debezium.relational.TableSchemaBuilder.lambda$create$2(TableSchemaBuilder.java:143) 
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) 
at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) 
at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1621) 
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) 
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) 
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) 
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) 
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) 
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) 
at io.debezium.relational.TableSchemaBuilder.create(TableSchemaBuilder.java:141) 
at io.debezium.relational.RelationalDatabaseSchema.buildAndRegisterSchema(RelationalDatabaseSchema.java:122) 
at io.debezium.connector.mysql.MySqlDatabaseSchema.lambda$applySchemaChange$2(MySqlDatabaseSchema.java:167) 
at java.base/java.lang.Iterable.forEach(Iterable.java:75) 
at io.debezium.connector.mysql.MySqlDatabaseSchema.applySchemaChange(MySqlDatabaseSchema.java:167) 
at io.debezium.pipeline.EventDispatcher$SchemaChangeEventReceiver.schemaChangeEvent(EventDispatcher.java:540) 
at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.lambda$handleQueryEvent$2(MySqlStreamingChangeEventSource.java:583) ... 10 more