1 files changed, 2 insertions, 2 deletions

diff --git a/dbparse.js b/dbparse.js
index dde0ff5..29b9cb7 100644
--- a/dbparse.js
+++ b/dbparse.js
@@ -129,7 +129,7 @@ async function writeShift(weekday, shiftId, shiftLine, courseLine, DB)
 				className = null;
 
 			dbOperations.push(DB.execute(
-				`INSERT INTO shifts VALUES (${weekday}, ${shiftId}, ?, ?, ?)`,
+				`INSERT IGNORE INTO shifts VALUES (${weekday}, ${shiftId}, ?, ?, ?)`,
 				[courseName, teacherName, className]
 			));
 		}
@@ -195,4 +195,4 @@ exports.build = writeShifts;
 exports.get = getShift;
 exports.randomIndex = getRandomIndex;
 exports.find = findExpression;
-exports.getNextChar = getNextChar;
\ No newline at end of file
+exports.getNextChar = getNextChar;