Create custom column based on condition of how another column value starts with

I have the following dataframe: Person Number Error Department Name Email Country
CZ 10054609 The identifier 11380151 is used by Veronika Fi... CZ:Supply Chain Pohořelice 1 Henkel Cosmeticos... verca.fialova.2001@gmail.com CZ 10054620 The identifier 11380126 is used by Radmila Val... CZ:Supply Chain Pohořelice 1 Henkel VAS (CZM63... rvalova1@seznam.cz CZ 10054728 The identifier 11805326 is used by Pavel Pecka... CZ:Supply Chain Pohořelice 3 Levis (CZM630.415... pavlias000@seznam.cz CZ 10054699 The identifier 11380232 is used by Sabina Love... CZ:Supply Chain Pohořelice 3 Marks and Spencer... s.loveckova@seznam.cz CZ 10054727 The identifier 11805358 is used by Tereza Holč... CZ:Supply Chain Pohořelice 3 Levis (CZM630.415... tholcapko@seznam.cz

I need to create a column named "Error Type" that follows the condition:

• If the "Error" column starts with "The Identifier" put the value as "Duplicated"
• If the column starts with "The data" put the value as "Transaction"

What would be the best way to solve it?