Error spamming in Mautic log .. Need help to figure what causing this error

Your software
My Mautic version is: 4.4.1
My PHP version is: 7.4
My Database type and version is: MySQL 8

Your problem
My problem is:
This messages are spamming in Mautic log.

Can anyone help me and tell me what it mean or what I need to fix to stop this error?

These errors are showing in the log:

(only copying and pasting few lines but it a repeat of the same lines in the log)


[2022-08-05 10:19:57] mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo4OiJmemJ2eSI7djo0O3Y6NzE7fWY6ODoiZnpidnkiO3Y6NzE7Zjo3OiJmZ2JnIjtmOjU1OiI5NWZiZjE5NjE4Y2Y1MjI5Mzk2MzA4IjtmOjc6InlmYmUiO2Y6ODoiNTE2MjgiO2Y6MDoiZHViYWFmeSI7Yjo0OntmOjg6ImZ6YnZ5Ijt2OjcxO319 {"exception":"[object] (Mautic\\CoreBundle\\Exception\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\"fbhedf\";b:5:{v:3;f:8:\"fzbvy\";v:4;v:71;}f:8:\"fzbvy\";v:71;f:7:\"fgbg\";f:55:\"95fbf19618cf5229396308\";f:7:\"yfbe\";f:8:\"51628\";f:0:\"dubaafy\";b:4:{f:8:\"fzbvy\";v:71;}} is not a serialized array at /home/edited/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:37)"} {"hostname":"*","pid":10128}
[2022-08-05 10:19:57] mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo4OiJmemJ2eSI7djo0O3Y6NzE7fWY6ODoiZnpidnkiO3Y6NzE7Zjo3OiJmZ2JnIjtmOjU1OiI5NWZiZjE5NjE4Y2Y1MjI5Mzk2MzA4IjtmOjc6InlmYmUiO2Y6ODoiNTE2MjgiO2Y6MDoiZHViYWFmeSI7Yjo0OntmOjg6ImZ6YnZ5Ijt2OjcxO319 {"exception":"[object] (Mautic\\CoreBundle\\Exception\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\"fbhedf\";b:5:{v:3;f:8:\"fzbvy\";v:4;v:71;}f:8:\"fzbvy\";v:71;f:7:\"fgbg\";f:55:\"95fbf19618cf5229396308\";f:7:\"yfbe\";f:8:\"51628\";f:0:\"dubaafy\";b:4:{f:8:\"fzbvy\";v:71;}} is not a serialized array at /home/edited/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:37)"} {"hostname":"*","pid":10135}
[2022-08-05 10:19:57] mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo4OiJmemJ2eSI7djo0O3Y6NzE7fWY6ODoiZnpidnkiO3Y6NzE7Zjo3OiJmZ2JnIjtmOjU1OiI5NWZiZjE5NjE4Y2Y1MjI5Mzk2MzA4IjtmOjc6InlmYmUiO2Y6ODoiNTE2MjgiO2Y6MDoiZHViYWFmeSI7Yjo0OntmOjg6ImZ6YnZ5Ijt2OjcxO319 {"exception":"[object] (Mautic\\CoreBundle\\Exception\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\"fbhedf\";b:5:{v:3;f:8:\"fzbvy\";v:4;v:71;}f:8:\"fzbvy\";v:71;f:7:\"fgbg\";f:55:\"95fbf19618cf5229396308\";f:7:\"yfbe\";f:8:\"51628\";f:0:\"dubaafy\";b:4:{f:8:\"fzbvy\";v:71;}} is not a serialized array at /home/edited/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:37)"} {"hostname":"*","pid":10130}
[2022-08-05 10:19:57] mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo4OiJmemJ2eSI7djo0O3Y6NzE7fWY6ODoiZnpidnkiO3Y6NzE7Zjo3OiJmZ2JnIjtmOjU1OiI5NWZiZjE5NjE4Y2Y1MjI5Mzk2MzA4IjtmOjc6InlmYmUiO2Y6ODoiNTE2MjgiO2Y6MDoiZHViYWFmeSI7Yjo0OntmOjg6ImZ6YnZ5Ijt2OjcxO319 {"exception":"[object] (Mautic\\CoreBundle\\Exception\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\"fbhedf\";b:5:{v:3;f:8:\"fzbvy\";v:4;v:71;}f:8:\"fzbvy\";v:71;f:7:\"fgbg\";f:55:\"95fbf19618cf5229396308\";f:7:\"yfbe\";f:8:\"51628\";f:0:\"dubaafy\";b:4:{f:8:\"fzbvy\";v:71;}} is not a serialized array at /home/edited/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:37)"} {"hostname":"*","pid":10132}
[2022-08-05 10:20:01] mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo4OiJmemJ2eSI7djo0O3Y6NzE7fWY6ODoiZnpidnkiO3Y6NzE7Zjo3OiJmZ2JnIjtmOjU1OiI5NWZiZjE5NjE4Y2Y1MjI5Mzk2MzA4IjtmOjc6InlmYmUiO2Y6ODoiNTE2MjgiO2Y6MDoiZHViYWFmeSI7Yjo0OntmOjg6ImZ6YnZ5Ijt2OjcxO319 {"exception":"[object] (Mautic\\CoreBundle\\Exception\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\"fbhedf\";b:5:{v:3;f:8:\"fzbvy\";v:4;v:71;}f:8:\"fzbvy\";v:71;f:7:\"fgbg\";f:55:\"95fbf19618cf5229396308\";f:7:\"yfbe\";f:8:\"51628\";f:0:\"dubaafy\";b:4:{f:8:\"fzbvy\";v:71;}} is not a serialized array at /home/edited/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:37)"} {"hostname":"*","pid":10129}
[2022-08-05 10:20:06] mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo4OiJmemJ2eSI7djo0O3Y6NzE7fWY6ODoiZnpidnkiO3Y6NzE7Zjo3OiJmZ2JnIjtmOjU1OiI5NWZiZjE5NjE4Y2Y1MjI5Mzk2MzA4IjtmOjc6InlmYmUiO2Y6ODoiNTE2MjgiO2Y6MDoiZHViYWFmeSI7Yjo0OntmOjg6ImZ6YnZ5Ijt2OjcxO319 {"exception":"[object] (Mautic\\CoreBundle\\Exception\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\"fbhedf\";b:5:{v:3;f:8:\"fzbvy\";v:4;v:71;}f:8:\"fzbvy\";v:71;f:7:\"fgbg\";f:55:\"95fbf19618cf5229396308\";f:7:\"yfbe\";f:8:\"51628\";f:0:\"dubaafy\";b:4:{f:8:\"fzbvy\";v:71;}} is not a serialized array at /home/edited/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:37)"} {"hostname":"*","pid":10128}
[2022-08-05 10:20:06] mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo4OiJmemJ2eSI7djo0O3Y6NzE7fWY6ODoiZnpidnkiO3Y6NzE7Zjo3OiJmZ2JnIjtmOjU1OiI5NWZiZjE5NjE4Y2Y1MjI5Mzk2MzA4IjtmOjc6InlmYmUiO2Y6ODoiNTE2MjgiO2Y6MDoiZHViYWFmeSI7Yjo0OntmOjg6ImZ6YnZ5Ijt2OjcxO319 {"exception":"[object] (Mautic\\CoreBundle\\Exception\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\"fbhedf\";b:5:{v:3;f:8:\"fzbvy\";v:4;v:71;}f:8:\"fzbvy\";v:71;f:7:\"fgbg\";f:55:\"95fbf19618cf5229396308\";f:7:\"yfbe\";f:8:\"51628\";f:0:\"dubaafy\";b:4:{f:8:\"fzbvy\";v:71;}} is not a serialized array at /home/edited/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:37)"} {"hostname":"*","pid":10132}