Message SAP BM008 - Overlap with dimension & is not permitted

Diagnosis
You have changed the exponents for a dimension. These changes overlapthe exponents of dimension &V1&. Each combination of exponents must beunique and reflects a physical dimension.
Examples:
All units of length are based on a dimension with a 1 in the exponentlength. The basis unit (SI unit) is Meter.
All units of time are based on a dimension with a 1 in the exponenttime. The basis unit (SI unit) is second.
Units of velocity are based on a dimension with a 1 in the exponentlength and a -1 in the exponent time. The basis unit (SI unit) isMeter/second.
All dimensions required can be derived from these seven basisdimensions(exponents).

Procedure
Make the appropriate corrections to your entries.