UPDATE [SensorCalibrations] SET InitialOffset2 = InitialOffset;
DROP INDEX [INDEX_SENSORCALIBRATIONS_SENSORID] ON [SensorCalibrations];
ALTER TABLE [SensorCalibrations] DROP COLUMN InitialOffset;
EXEC sp_rename 'SensorCalibrations.InitialOffset2', 'InitialOffset', 'COLUMN';
ALTER TABLE [SensorCalibrations] ALTER COLUMN InitialOffset NVARCHAR(MAX) NOT NULL;
CREATE NONCLUSTERED INDEX [INDEX_SENSORCALIBRATIONS_SENSORID] ON [SensorCalibrations]
(
	[SensorId] ASC
)
INCLUDE ( 	[SensorCalibrationId],
	[CalibrationDate],
	[Username],
	[LocalOnly],
	[NonLinear],
	[CalibrationRecords],
	[ModifyDate],
	[IsProportional],
	[RemoveOffset],
	[ZeroMethod],
	[CertificationDocuments],
	[InitialOffset]);