Winter tire false load index. Do new ones have to come?

Hello, I bought a Ford Galaxy WGR 1.9 TDI from 2003 in April of this year. During the purchase already winter tyres were present, when I looked at the tires today (not only the profile) I noticed the two of the tires carry a load index of 89 and therefore only 580 kg per tire and 1160 kg per axle have. However, the car has a maximum axle load of 1240 kg at the front and at the HA 1280 Kg in trailer operation the axle loads may even be 1315 kg respectively. 1355 Kg. (Information According to vehicle registration) The vehicle registration shows a load index of 97 /99. Do the above WR have to be replaced? I also have no possibility to measure the axle load. Thank you for your help. Greeting Hendrik