WI Nicephorus Diogenes kills Emperor Alexius I in 1094?

In early 1094 General Tatikius was placed in charge of guarding Emperor Alexius's I tent at Pentegostis. Here he discovered the plot of Nicephorus Diogenes, son of the former emperor Romanus IV, to kill the emperor. Nicephorus was an old friend of Alexius and Tatikius and Alexius was reluctant to punish him, but it was clear that Nicephorus was ambitious for the throne. In OTL following the reveal of his plot he was exiled and blinded...
WI Nicephorus was succesfull in killing Alexius I and proclaimed himself Emperor?
How is this altering History? Any thoughts?
 
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