SQLiteException: Constraint

[jayantha]

I did my first project successfully.
Now I am in my 2nd .I tried hard to find the issue
I think it is with primary key 
Any common advice please

SimpleSQL.SimpleSQLManager.Insert (System.Object obj, System.Int64& rowID) (at <9d351781d88446ec91fb4a6de237d175>:0)
SimpleSQL.SimpleSQLManager.Insert (System.Object obj) (at <9d351781d88446ec91fb4a6de237d175>:0)
SimpleSQL.Demos.insert_cus.SaveTable_stats (System.Int32 tid, System.String dr_title, System.String c_name, System.String c_age, System.String c_tp, System.String c_adr) (at Assets/MY SCRIPTS/insert_cus.cs:59)

line 59 >> dbManager.Insert(tableStats);

[echo17]

A constraint error is usually the primary key, but it could be other issues depending on how your database is set up. A primary key violation means you are inserting a duplicate value into your primary key field. Primary keys need to be unique.

SimpleSQL is a Unity wrapper for sqlite, so you can find answers to sqlite issues on the internet. Here is a search to get you started: link

From that search I see this answer from someone:

"It probably means your insert statement is violating a constraint in the new table. Could be a primary key constraint, a unique constraint, a foreign key constraint (if you're using PRAGMA foreign_keys = ON;), and so on.

You fix that either by dropping the constraint, correcting the data, or dropping the data. Dropping the constraint is usually a Bad Thing, but that depends on the application."

[jayantha]

Again thanks for your response .with your advice I rechecked and I found it. I have not inserted data correctly to one of the fields which is NOT NULL .