Restarting task may cause serialization to fail

When restarting a task, the scanned files that are already in the database, are not deleted prior to adding new ones from the new scan.

Additional info:
Preparing query for 48035 records: INSERT INTO scanned_files(id,rel_path,base_path_id,attr,size,time_created,time_last_write,time_last_access,flags) VALUES(?,?,?,?,?,?,?,?,?)
TBaseException.cpp(15) : atlTraceGeneral - *** Base Exception is being thrown:
Msg: Cannot perform step on the statement. SQLite reported error: UNIQUE constraint failed: scanned_files.id
Error code: 5004
File: TSQLiteStatement.cpp
Line number: 90
Function: chcore::sqlite::TSQLiteStatement::Step
First-chance exception at 0x00007FF87CEA8B9C in ch64.exe: Microsoft C++ exception: chcore::sqlite::TSQLiteException at memory location 0x000000EF6E71F100.
Debug Assertion Failed!

Program: C:\projects\ch-rw\bin\Debug\libchcore64ud.dll
File: TSQLiteStatement.cpp
Line: 43

Expression: iResult == SQLITE_OK

For information on how your program can cause an assertion
failure, see the Visual C++ documentation on asserts.

(Press Retry to debug the application)