Check your MySql Version by using below comment,
Mysql > Select Version
Your version is above 5.7.21-0ubuntu0.16.04.1
Then check sql mode
Mysql > SELECT [spam-filter]sql_mode
After then execute the below code in your phpmyadmin or Mysql
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Check your MySql Version by using below comment,
Mysql > Select Version
Your version is above 5.7.21-0ubuntu0.16.04.1
Then check sql mode free vbucks generator
Mysql > SELECT [spam-filter]sql_mode
After then execute the below code in your phpmyadmin or Mysql